2021-2022高三英语周报第七期答案

9.AB本题考查双曲线与椭圆的概念.若曲线C是双曲线,则ab<0,故A项正确;若C是离心率为2的双曲线,当a>0时,b<0,则23,故B项正确当a<0,b<0时,ab>0,曲线C不是椭圆,故C项错误;若C是离心率为的椭圆,当a>b>0时,则()2a,a=4;当b>a>0时,(2)2故D项错误

32.D。细节理题。根据第二段第二句 The puzzle was what benefit would be gained from it whenperformance might be affected the following day.可知。33.A。细节理解题。根据第三段第一句 To take a closer look, her team studied35 healthy peopleas they slept in the unfamiliar environment of the university's Department of PsychologicalSciences.可知34.C。细节理解题。根据最后一段第一句 Curious if the left hemispheres were indeed remainingawake to process information detected in the surrounding environment a] ll35.B。推理判断题。根据最后一段可知。

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