题目内容

1. She's a ______ woman who believes marriage comes by destiny.A. sensible B. sensational C. senseless D. sentimental2. It is generally agreed that education is a matter of learning process from ______ to grave.A. birth B. beginning C. origin D. cradle3. We’d better keep off ______ topics when talking with people from another culture.A. particular B. special C. sensitive D. unique4. She is acutely aware of the discrepancy between her inner state and her public ____.A. demeanor B. action C. move D. status5. A translator must be armed with the excellent ability of expressiveness and ______ imagination.A. live B. living C. alive D. vivid6. Currently, government should give _____ to its education rather than economic reform.A. priority B. preemption C. preference D. highlight7. Our wildlife trips offer a ______ encounter with wildlife in its natural state.A. influential B. positive C. thrilling D. thoughtful8. Only when we realize the importance of helping each other can we be ______ to building a harmonious society.A. devoted B. focused C. concentrated D. absorbed9. A neighbor asked for the music to be turned down and the party broke ______.A. down B. off C. away D. up10. Thefirst______oftheprojectwascompletedtwomonthsaheadofschedule.A. process B. section C. span D. phase11. A student is practicing writing the Chinese ______ xue, which means to study or to learn.A. word B. letter C. script D. character12. These trophies are constant ______ of his glorious basketball career.A. remainder B. retainer C. reminder D. retriever13. His wages were ______ up by his wine bills.A. drowned B. swallowed C. consumed D. worn14. We should make decisions in accordance with ______ conditions.A. special B. specialized C. specific D. specified15. Anne and Mike were indeed a beautiful couple ______ and I miss them terribly already.A. now and then B. pure and simple C. inside and out D. fair and square

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如果连续的增加某种生产要素,当总产量达到最大时,边际产量曲线( )。

A. 与横轴相交;
B. 经过原点;
C. 与平均产量曲线相交;
D. 与纵轴相交

当平均产量为正但递减时,边际产量是( )。

A. 递减;
B. 负的;
C. 零;
D. 上述任何一种

在有效区域中,等产量曲线( )。

A. 凸向原点;
B. 负向斜率;
C. 不能相交;
D. 上述都正确。

如果等成本线与等产量线没有交点,那么要生产等产量曲线所表示的产量应该( )。

A. 增加投入;
B. 减少投入;
C. 维持不变;
D. 均不正确

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