已知-2x2+5x+c≥0的解为则c为()．
已知-2x2+5x+c≥0的解为
则c为()．
Theratioof2quantifiesis5to6.Ifeachoftheq
The ratio of 2 quantifies is 5 to 6. If each of the quantities is increased by 15, what is the ratio of these two new quantifies
A、5:6
B、25:27
C、15:16
D、20:21
E、It cannot be determined from the information given.
As recently as 1950, tuberculosis
Asrecentlyas1950,tuberculosiswasnevercurableunlesssequesteredinsanitariums;today,thedrugIsoniazidhasmadesuchtreatmentobsolete.（）(A)unlesssequestered(B)withoutsequestering(C)withoutbeingsequestered(D)unlessitwassequestered(E)unlesspatientsweresequesteredThefollowingdatasufficiencyproblemsconsi
The following data sufficiency problems consist of a question and two statements, labeled (1) and (2), in which certain data are given. You have to decide whether the data given in the statements are sufficient for answering the question. Using the data given in the statements plus your knowledge of mathematics and everyday facts (such as the number of days in July or the meaning of counterclockwise), you must indicate whether
A、 Statement (1)ALONE、is sufficient, but statement (2) alone is not sufficient.
B、 Statement (2)ALONE、is sufficient, but statement (1) alone is not sufficient.
C、BOTH statements TOGETHER are sufficient, but NEITHER statementALONE、is sufficient.
D、EACH statementALONE、is sufficient.
Ｅ. Statements (1) and (2) TOGETHER are NOT sufficient.
If 5a=9b=15c, what is the value of a+b+c
(1) 3c-a=5c-3b
(2) 6cb=10aIdeally, the professional career diploma
Ideally, the professional career diplomat should help in the ongoing maintenance of an effective American foreign policy despite changes in administration.（）
(A) in the ongoing maintenance of
(B) in the maintaining of
(C) maintain
(D) to maintain and continue
(E) the maintenance ofThefollowingquestionspresentasentence,pa
The following questions present a sentence, part of which or all of which is underlineD、Beneath the sentence, you will find five ways of phrasing the underlined part. The first of these repeats the original; the other four are different. If you think the original is best, choose the first answer; otherwise choose one of the others.
These questions test correctness and effectiveness of expression. In choosing your answer, follow the requirements of standard writtenEnglish; that is, pay attention to grammar, choice of words, and sentence construction.Choose the answer that produces the most effective sentence; this answer should be clear and exact, without awkwardness, ambiguity, redundancy, or grammatical error.
The genius ofBeethoven can be seen in the widely observed phenomenon that his music has the same appeal to an illiterate shepherd wandering the steppes of Kazakhstan as to a professional musician sipping her latte in Paris.
A、Kazakhstan as to
B、Kazakhstan, just as to
C、Kazakhstan; just as it would to a
D、Kazakhstan, as it would to a
E、Kazakhstan as aThefollowingquestionspresentasentence,pa
The following questions present a sentence, part of which or all of which is underlineD、Beneath the sentence, you will find five ways of phrasing the underlined part. The first of these repeats the original; the other four are different. If you think the original is best, choose the first answer; otherwise choose one of the others.
These questions test correctness and effectiveness of expression. In choosing your answer, follow the requirements of standard writtenEnglish; that is, pay attention to grammar, choice of words, and sentence construction.Choose the answer that produces the most effective sentence; this answer should be clear and exact, without awkwardness, ambiguity, redundancy, or grammatical error.
The gap in the ozone layer over the North Pole can expand each summer enough that it exposes regions as far south as Sweden by heightened UV radiation, also increasing rates of skin cancer in the northern regions by as much as 50 percent.
A、that it exposes regions as far south as Sweden by heightened UV radiation, also increasing
B、that regions as far south as Sweden have been exposed to heightened UV radiation, as well as having increased
C、to expose regions as far south as Sweden to heightened UV radiation, increased
D、to expose regions as far south as Sweden to heightened UV radiation and increase
E、that exposure to heightened UV radiation in regions as far south as Sweden, as well as increasingJJ79. 好像是三种不同颜色的车(a,b,c)比例为2:5:4，c
JJ79. 好像是三种不同颜色的车(a,b,c)比例为2:5:4，c比a多1300，问b有多少Modern critics are amused by early schol
Moderncriticsareamusedbyearlyscholars'categorizingTacitus'sGermaniaasanethnographictreatise.（）(A)scholars'categorizingTacitus'sGermaniaas(B)scholars'categorizingTacitus'sGermaniaasif(C)scholars,categorizingofTacitus'sGermaniaas(D)scholarswhocategorizeTacitus'sGermaniaas(E)scholarswhocategorizeTacitus'sGermaniaifAwholesalefruitdistributor,inanefforttoi
A、wholesale fruit distributor, in an effort to increase its profit margins, has proposed cutting the tops off of the pineapples it ships in order to increase the number of pineapples it can ship in a standard-size truck.
Which of the following, if true, gives the strongest evidence that the fruit distributor’s plan will increase its profit margins
A、Pineapples with the tops cut off have been shown to rot three times faster than uncut fruit.
B、Customers buy whole pineapples in part because of their exotic, spiky appearance.
C、Cutting the tops off of pineapples may inadvertently remove some of the fruit within.
D、The fruit distributor ships primarily to a fruit canning company that has no use for pineapple tops.
E、Pineapple juice has been shown to be an even more potent source of vitamin
C、than orange or cranberry juice.Thefollowingquestionspresentasentence,pa
The following questions present a sentence, part of which or all of which is underlineD、Beneath the sentence, you will find five ways of phrasing the underlined part. The first of these repeats the original; the other four are different. If you think the original is best, choose the first answer; otherwise choose one of the others.
These questions test correctness and effectiveness of expression. In choosing your answer, follow the requirements of standard writtenEnglish; that is, pay attention to grammar, choice of words, and sentence construction.Choose the answer that produces the most effective sentence; this answer should be clear and exact, without awkwardness, ambiguity, redundancy, or grammatical error.
After his 1962 season, in which he set a record for on-base percentage, Mitch McAlister left his old team and signed with the Springfield Argonauts, with an annual salary of $550,000 and was the highest salary in professional baseball at that time.
A、Argonauts, with an annual salary of $550,000 and was the
B、Argonauts, earning $550,000 per year and it was the
C、Argonauts for a yearly wage of $550,000, being the
D、Argonauts, with annual pay of $550,000 per year, which was the
E、Argonauts for an annual salary of $550,000, theDuring the first year after the corporat
Duringthefirstyearafterthecorporatereorganization,nooneconsideredthemanagementwaswell-organized;managerswerelargelyuntrainedanddirectionless.（）(A)waswell-organized(B)well-organized(C)werewell-organized(D)seemedtobewell-organized(E)seemedwell-organizedWhichofthefollowingfractionshasthegreate
Which of the following fractions has the greatest value
Studentsatacertainuniversityhavecomplain
Students at a certain university have complained that some of their professors do not provide copies of their lecture notes at every class. The student body president has argued that, in order to further the educational purposes of the university, all professors should be required to post their lecture notes online.
Which of the following, if true, most weakens the students’ argument that the professors should be required to post their lecture notes online
A、At the most popular classes, there are often insufficient quantities of lecture note copies to accommodate all of the students.
B、Students have acknowledged that if the lecture notes are posted online, they will be less likely to go to class.
C、Professors complain that the university does not provide sufficient copying funds, so that professors often have to pay for copies of lecture notes out of their own pockets.
D、Over 80 percent of students have access to the Internet in their dorm rooms, and all students have 24-hour access to the Internet at the computer laB、
E、The university has publicly stated that one of the educational goals of the university is to help all students gain competency with the Internet.Thefollowingquestionspresentasentence,pa
The following questions present a sentence, part of which or all of which is underlineD、Beneath the sentence, you will find five ways of phrasing the underlined part. The first of these repeats the original; the other four are different. If you think the original is best, choose the first answer; otherwise choose one of the others.
These questions test correctness and effectiveness of expression. In choosing your answer, follow the requirements of standard writtenEnglish; that is, pay attention to grammar, choice of words, and sentence construction.Choose the answer that produces the most effective sentence; this answer should be clear and exact, without awkwardness, ambiguity, redundancy, or grammatical error.
Although he played several musical instruments while being a child, Maestro Macintosh did not begin playing the piano until he was 23 years olD、
A、while being a child
B、as a child
C、as in childhood
D、at the time of his childhood
E、at the time when he was a childThequestionsinthisgrouparebasedonthecont
The questions in this group are based on the content of a passage.After reading the passage, choose the best answer to each question.Answer all questions following the passage on the basis of what is stated or implied in the passage.
While most people agree that the GoldenAge of comic books began with the introduction of Superman in 1938 in ActionComics #1, there is less agreement about when exactly the GoldenAge endeD、There is a general consensus, however, about the factors that brought the GoldenAge to a close: the rise of the horror comic book in the late 1940s, and the resulting backlash against comic books in the early 1950s.
Superhero comic books reached their peak of popularity in the early 1940s because of all the GIs inEurope and Japan who eagerly read about Superman,Batman, and The Spirit. When these soldiers came home, they still wanted to read comic books, but they sought out more adult content. William Gaines ofEC、Comics was happy to meet the market demand with such grim and gritty titles as Weird Fantasy and TheCrypt of Terror. The creators of superhero comic books, not wanting to be left behind, responded by matching their protagonists against darker criminals in more violent encounters.
These darker comic books aroused the anger of child psychologist Fredric Wertham, who believed that comic books were leading the nation’s youth into crime, violence, and drug abuse. Wertham’s book, The Seduction of the Innocent, was a national best-seller that helped bring about congressional investigations into the corrupting influence of comic books. The Senate committee that reviewed Wertham’s charges decided to create theComicsCodeAuthority, a regulatory body that prohibited comic books from mentioning sexuality, alcohol, drugs, criminal behavior, or any themes related to the horror genre.
These regulations had a numbing effect on the industry.EC、Comics was nearly driven out of the comics business, and the other major players canceled many of their most prominent titles. The comics business did not recover until the Marvel revolution of the early 1960s ushered in the SilverAge.
According to the final paragraph of the passage, what may we infer about the comic book companies of the SilverAge
A、They were able to create popular comic books despite the regulations of theComicsCodeAuthority.
B、They achieved commercial success because of the popularity of characters such as Spider-Man, the Hulk, and the Fantastic Four.
C、They repeated the same mistakes as the comic book companies of the GoldenAge.
D、They failed to succeed because of the numbing effect of theComicsCodeAuthority regulations.
E、MarvelComics was the only major comic book company to survive from the GoldenAge into the SilverAge.AnAmericanmanufacturerofspaceheatersrepo
AnAmerican manufacturer of space heaters reported a 1994 fourth-quarter net income (total income minus total costs) of $41 million, compared with $28.3 million in the fourth quarter of 1993. This increase was realized despite a drop in U.S. domestic retail sales of space-heating units toward the end of the fourth quarter of 1994 as a result of unusually high temperatures.
Which of the following, if true, would contribute most to an explanation of the increase in the manufacturer’s net income
A、In the fourth quarter of 1994, the manufacturer paid its assembly-line workers no salaries in November orDecember because of a two-month-long strike, but the company had a sufficient stock of space-heating units on hand to supply its distributors.
B、In 1993, because of unusually cold weather in the Northeast, the federal government authorized the diversion of emergency funding for purchasing space-heating units to be used in the hardest-hit areas.
C、Foreign manufacturers of space heaters reported improved fourth-quarter sales in theAmerican market compared with their sales in 1993.
D、During the fourth quarter of 1994, the manufacturer announced that it would introduce an extra-high-capacity space heater in the following quarter.
E、In the third quarter of 1994, a leading consumer magazine advocated space heaters as a cost-effective way to heat spaces of less than 100 square feet.Thefollowingdatasufficiencyproblemsconsi
The following data sufficiency problems consist of a question and two statements, labeled (1) and (2), in which certain data are given. You have to decide whether the data given in the statements are sufficient for answering the question. Using the data given in the statements plus your knowledge of mathematics and everyday facts (such as the number of days in July or the meaning of counterclockwise), you must indicate whether
A、Statement (1)ALONE、is sufficient, but statement (2) alone is not sufficient.
B、Statement (2)ALONE、is sufficient, but statement (1) alone is not sufficient.
C、BOTH statements TOGETHER are sufficient, but NEITHER statementALONE、is sufficient.
D、EACH statementALONE、is sufficient.
Ｅ. Statements (1) and (2) TOGETHER are NOT sufficient.
If b＞a, then a is what percent of b
(1) a=4
(2) b=4aWhenunscrupulouspeopleshoplift,aviciousc
When unscrupulous people shoplift, a vicious cycle results. Retailers must raise their prices in order to make up for the lost sales, and the higher prices encourage more people to shoplift. This vicious cycle hurts honest consumers worst of all, because they have to pay higher prices.
The vicious cycle described above could not happen unless which of the following is true
A、Shoplifters usually steal only items that they need but cannot afforD、
B、Retailers do not take shoplifting losses into account when they initially set their prices.
C、The best way for retailers to address shoplifting is by punishing shoplifters to the tallest extent of the law.
D、Some people would shoplift no matter how low retailers set their prices.
E、It costs retailers more to pay security guards to prevent shoplifting than just to absorb the cost of occasional losses due to theft.