托福考试易错题（2019/3/26）

第1题：口语 学校是否应该在宿舍楼卖食物(晚上，考试期间)

【分析题】：

第2题： {$mediaurl} According to the professor, what can initiate anaphylaxis Click on two answers. Alcohol Bee venom C．Peanuts D．A、virus

【多选题】： A     B     C     D

第3题：Listening 2 "GeologyClass" {$mediaurl} Why does the professor say this: A、To remind the students of the topic for today’s session B、To indicate that he expects the students to read the textbook C、To encourage the students to participate in the discussion D、To demonstrate his respect for the students in his class

【单选题】： A     B     C     D

第4题：Some animal behaviorists argue that certain animals can remember past events,　　anticipate future ones, make plans and choices, and coordinate activities within 　　a group. These scientists, however, are cautious about the extent to which animals　　can be credited with conscious processing.(5) Explanations of animal behavior that leave out any sort of consciousness at 　　all and ascribe actions entirely to instinct leave many questions unanswereD、　　One example of such unexplained behavior: Honeybees communicate the sources of 　　nectar to one another by doing a dance in a figure-eight pattern. The orientation 　　of the dance conveys the position of the food relative to the sun’’s position in the sky,(10)and the speed of the dance tells how far the food source is from the hive. Most 　　researchers assume that the ability to perform and encode the dance is innate and shows 　　no special intelligence.But in one study, when experimenters kept changing the site of the 　　food source, each time moving the food 25 percent farther from the previous site, foraging 　　honeybees began to anticipate where the food source would(15)appear next. When the researchers arrived at the new location, they would find the 　　bees circling the spot, waiting for their fooD、No one has yet explained how bees,　　whose brains weigh four ten-thousandths of an ounce, could have inferred the location 　　of the new site. Other behaviors that may indicate some cognition include tool use. Many(20)animals, like the otter who uses a stone to crack mussel shells, are capable of using objects in the　　natural environment as rudimentary tools. One researcher has found that mother chimpanzees　　occasionally show their young how to use tools to open hard nuts. In one study, chimpanzees　　compared two pairs of food wells containing chocolate chips. One pair might contain, say, five　　chips and three chips, the other(25)our chips and three chips.Allowed to choose which pair they wanted, the　　chimpanzees almost always chose the one with the higher total, showing some sort of summing　　ability. Other chimpanzees have learned to use numerals to label quantities of items and do simple sums.The word "rudimentary" in line 21 is closest in meaning to A、superior B．original C．basic D．technical

【单选题】： A     B     C     D

第5题：Question 41- 50:InDeath Valley,California, one of the hottest, most arid places in NorthAmerica, there is much salt, and salt can damage rocks impressively. Inhabitants of areas elsewhere, where streets and highways are salted to control ice, are familiar with the resulting rust and deterioration on cars. That attests to the chemically corrosive nature of salt, but it is not the way salt destroys rocks. Salt breaks rocks apart principally by a process called crystal prying and wedging. This happens not by soaking the rocks in salt water, but by moistening their bottoms with salt water. Such conditions exist in many areas along the eastern edge of centralDeath Valley. There, salty water rises from the groundwater table by capillary action through tiny spaces in sediment until it reaches the surface.Most stones have capillary passages that suck salt water from the wet grounD、Death Valley provides an ultra-dry atmosphere and high daily temperatures, which promote evaporation and the formation of salt crystals along the cracks or other openings within stones. These crystals grow as long as salt water is available. Like tree roots breaking up a sidewalk, the growing crystals exert pressure on the rock and eventually pry the rock apart along planes of weakness, such as banding in metamorphic rocks, bedding in sedimentary rocks, or preexisting or incipient fractions, and along boundaries between individual mineral crystals or grains.Besides crystal growth, the expansion of halite crystals(the same as everyday table salt) by heating and of sulfates and similar salts by hydration can contribute additional stresses. A、rock durable enough to have withstood natural conditions for a very long time in other areas could probably be shattered into small pieces by salt weathering within a few generations.The dominant salt inDeath Valley is halite, or sodium chloride, but other salts, mostly carbonates and sulfates, also cause prying and wedging, as does ordinary ice. Weathering by a variety of salts, though often subtle, is a worldwide phenomenon. Not restricted to arid regions, intense salt weathering occurs mostly in salt-rich places like the seashore, near the large saline lakes in theDry Valleys ofAntarctica, and in desert sections ofAustralia, New Zealand, and centralAsi A、In lines 17-18, the author mentions the "expansion of halitecrystals...by heating and of sulfates and similar salts by hydration"in order to A、present an alternative theory about crystal growth B、explain how some rocks are not affected by salt C．simplify the explanation of crystal prying and wedging D．introduce additional means by which crystals destroy rocks

【单选题】： A     B     C     D