小明到眼镜店调查了近视眼镜的度数和镜片焦距的关系如下表:眼镜片度数y(度)400

题型:解答题

问题:

小明到眼镜店调查了近视眼镜的度数和镜片焦距的关系如下表:
眼镜片度数y(度)40062580010001250
镜片焦距x(cm)251612.5108
(1)根据上表体现出来的规律,请写出眼镜度数y(度)与镜片焦距x(cm)之间的函数关系式;
(2)若小明所戴眼镜度数为500度,求该镜片的焦距.
考点:求反比例函数的解析式及反比例函数的应用
题型:解答题

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小题2:Sam was getting b______with the TV programme, so he turned off the TV and went to bed.

小题3:Charlie made people laugh and feel c_________(满足的)with their lives.  

小题4:People are ________ (困惑的)about all the different labels on food .

小题5:In the past ten years, Government has ___________(减少) the price of certain drugs for some 11 times.     

小题6:Charlie was given a special Oscar for his__________ (杰出的)work in films. 

小题7:The news spread t_________     the world quickly.

小题8:___________ (不幸的是) both his parents were killed in an accident.

小题9:He ___________ (克服) his fear of heights and followed the others to the top of the mountain.

小题10:The play was so ________  (幽默的)that the audience laughed all through it.

题型:解答题

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A.10万元

B.30万元

C.40万元

D.50万元

题型:解答题

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B.其婴儿多半受感染

C.分娩时通过母血传播,但不通过其唾液和汗液传播给婴儿

D.其婴儿将不会成为病毒携带者

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题型:解答题

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题型:解答题

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A.换油滤器

B.增加冷却水量

C.减负荷

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