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【单选题】
两岁的小芳，父母工作都忙，经常加班，因此就把她送到托幼机构，好在托幼机构质量比较高，减去了小芳父母的很多负担，小芳父母也更专注于工作，给小芳创造了更好的生活，这说明父母养育行为受哪种因素影响（）A.
儿童保育安排
B.
贫困
C.
重大社会生活变迁
D.
社区环境
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【单选题】Which of the following is true?
A.
If the consumer is a buyer of several units of a good, the earlier units will have greater marginal value and therefore create more consumer surplus, because marginal willingness to pay falls as greater quantities are consumed in any period.
B.
When some units of output can be produced at a cost that is lower than the market price, the seller receives a surplus, or net benefit, from producing those units.
C.
At the market equilibrium both consumers and producers benefit from trading every unit up to the market equilibrium output.
D.
All of the above are true.
【简答题】Questions 36 to 40 are based on the following. In the early days of nuclear power, the United States made money on it. But today opponents have so complicated its development that no nuclear plants ha...
【单选题】Which of the following can be inferred from the passage about cotton production in the United States after the introduction of Whitney's cotton gin?
A.
More cotton came from sea island cotton plants than before.
B.
More cotton came from short-staple cotton plants than before.
C.
Most cotton produced was sold domestically.
D.
Most cotton produced was exported to England.
【简答题】请观看电影《阳光灿烂的日子》“开锁入室”片段和原著小说《动物凶猛》中相应的文字,然后根据自己的理解阐释下视听语言和文字语言的差异。
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