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設(shè)二階可導(dǎo)函數(shù)f(x)在x0點(diǎn)滿足f′(x0) =0,f〞(x0)>0,則x0是f(x)的()
A.駐點(diǎn)
B.零點(diǎn)
C.極大值點(diǎn)
D.非極值點(diǎn)
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Questions 11-14 Complete the notes below. Choose o...
Questions 11-14 Complete the notes below. Choose one suitable word from the Reading Passage above for each answer. Write your answers in boxes 11-14 on your answer sheet. Traditional refrigerators use 11___________ pumps to drop temperature. At present, scientists are searching for other methods to produce refrigeration, especially in computer microprocessors 12___________ materials have been tried to generate temperature drops five times bigger than any previously recorded 13___________ effect has also been adopted by many researchers to cool hotspots in computers. A miniature version of a car 14___________ may also be a system to realize ideal computer cooling in the future.
11.___________
13.___________
14.___________
12.___________
答案:
11. vapor-compression 12. thermoelectric 13. Peltier 14. Sti...
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《建設(shè)部關(guān)于貫徹落實(shí)國務(wù)院<關(guān)于進(jìn)一步加強(qiáng)安全生產(chǎn)工作的決定>的意見》提出,到()年,全國建設(shè)系統(tǒng)安全生產(chǎn)狀況明顯好轉(zhuǎn),重特大事故得到有效遏制,建筑施工和城市市政公用行業(yè)事故起數(shù)和死亡人數(shù)均有較大幅度的下降。
A.2005
B.2007
C.2010
D.2020
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