题目内容
调频灵敏度越大，说明调制信号对瞬时频率的控制能力越强。
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调频电路的功能是将输入调频信号的瞬时频偏变换为相应解调输出电压。（ ）
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
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（ ）。
当平均产量为正但递减时，边际产量是（ ）。
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