高考习题练习

高考每日一练（2019/3/12）

第1题：Why does cream go bad faster than butter Some researchers think they have the answer, and it comes down to the structure of the food, not its chemical composition—a finding that could help rid some processed foods of chemical preservatives.
Cream and butter contain pretty much the same substances, so why cream should sour much faster has been a mystery.Both are emulsions—tiny globules (小球) of one liquid evenly distributed throughout another. The difference lies in what’s in the globules and what’s in the surrounding liquid, saysBrocklehurst, who led the investigation.
In cream, fatty globules drift about in a sea of water. In butter, globules of a watery solution are locked away in a sea of fat. The bacteria which make the food go bad prefer to live in the watery regions of the mixture. "This means that in cream, the bacteria are free to grow throughout the mixture," he says.
When the situation is reversed, the bacteria are locked away in compartments (密封) buried deep in the sea of fat. Trapped in this way, individual colonies cannot spread and rapidly run out of nutrients. They also slowly poison themselves with their waste products. "In butter, you get a self-limiting system which stops the bacteria growing," saysBrocklehurst.
The researchers are already working with food companies keen to see if their products can be made resistant to bacterial attack through alterations to the food’s structure.Brocklehurst believes it will be possible to make the emulsions used in salad cream, for instance, more like that in butter. The key will be to do this while keeping the salad cream liquid and not turning it into a solid lump.
Commercial application of the research finding will be possible if salad cream can be made resistant to bacterial attack ______.
A、by varying its chemical composition
B、by turning it into a solid lump
C、while keeping its structure unchanged
D、while retaining its liquid form

【单选题】： A B C D

第2题：

A．

B．

C．

D．

【单选题】： A B C D

第3题：(15分)近代社会的民主思想与实践材料1908年8月，清廷批准了预备立宪的方案，九年内计划做的主要工作包括：设立谘议局、资政院，开办地方自治，清理财政，推行普及国民教育，修订法典，厘定官制、官规，宣布宪法，颁布议院法、选举法，进行上下议院议员选举，等。1910年(宣统二年)11月，清廷发布上谕：“今者，人民代表吁恳既出于至诚，内外臣工强半皆主张急进，民气奋发……应即俯顺臣民之请……着缩改于宣统五年，实行开设议院。先将官制厘订，提前颁布试办，预即组织内阁。迅速遵照钦定宪法大纲，编订宪法条款，并将议院法，上下议院议员选举法，及有关于宪法范围以内必须提前赶办事项，均着同时并举。”1911年5月，责任内阁成立，13名国务大臣中满人9人，其中皇族7人，汉人仅4人，时人形象地将此称为“皇族内阁”。 ——摘编自金毓黻《宣统政纪》等根据材料并结合所学知识，说明预备立宪未能挽救清政府的原因。(6分)

【分析题】：

第4题：

A．

B．

C．

D．

【单选题】： A B C D

第5题：The habits of those who constantly play video games are of great interest to people working in the video-game industry. If video games are going to be one of the most attractive features of future interactive television systems, it is important for manufacturers to know what types of games to produce, how best to present such games on interactive video, and how to ensure that such games maintain their fascination for people.Above all, it is essential to build up detailed profiles of people who are addicted to video games.
Until recently, the chief market for video games has been boys aged 8 to 15. The fascination for interactive video games is seen in its purest form in this group. Video games appeal to some deep instinct in boys, who find it impossible to tear themselves away from them. Schoolwork is neglected, health is damaged, and even eating habits are affecteD、Girls of the same age, however, are entirely different, demonstrating far greater freedom from the hold of video games. Quite simply, they can accept and deal with video games easily, being able to play them when they want and then leave them alone.
Aware of the reliance on boys of such a relatively narrow age group, some video-game manufacturers have tried to attract younger boys while others have concentrated on providing an older audience with an excuse to extend its game-playing habits into adulthooD、These attempts have certainly had some success, though it must be admitted, of a fairly limited nature in comparison with the huge success of the 8 to 15 age group.
No one has yet succeeded, however, in making video games attractive to the largest market of all: young adult women. These women buy more novels and watch more films and television dramas than any other single section of the population—but few show interest in video games.
Attracting young women to video games has been ______.
A、far more successful than attracting older teenage boys
B、as successful as attracting younger teenage boys
C、less successful than attracting both younger and older teenage boys
D、only a little more successful than attracting very young boys

【单选题】： A B C D

第6题：

A．

B．

C．

D．

【单选题】： A B C D

第7题：谋求世界各国经济共同发展的根本途径是______。
A．加速各国经济结构的调整
B．推动南北对话
C．加强南南合作
D．建立公正、合理、平等、互利的国际经济新秩序

【单选题】： A B C D

第8题：Bob called to tell his mother that he couldn’t enter the house, for he ________ his key at school.
A、had left
B．would leave
C．was leaving
D．has left

【单选题】： A B C D

第9题：

I与碱石灰共热可转化为立方烷，立方烷的核磁共振氢谱中有{{U}} {{/U}}个峰。