英语周报九年级新课程第14集2022~2022学年2022年11月18日，星期四答案

11.ABD考查目标本题主要考查了双曲线的性质,意在考查考生的推理论证能力和转化与化归思想思路点拔由题意可知b=,c=2,又a2+b2=2,所以a=1,b3,所以2,故A正确;点F(-2,0)到直线y=3x的距离d=1,33,故B正确≥21,C错:读1与双曲C的两条渐近线交于M,N两点,则MN45,所以S2m=2452=43,故D正确规律总结求双曲线离心率或其范围的方法:(1)求a,b,c的值,由一==1+直接求e(2)列出含有a,b,c的齐次方程(或不等式),借助于b2=2-清去b,然后转化成关于e的方程(或不等式)求解

书面表达One possible version:NOTICEA sports meeting will be held in the playground of our school from next Thursday to FridayAs you know, the pressure of study is very heavy now, especially for those senior 3. So the purpose of the sports meeting is to letevery student get relaxed, as a result of which we students can live happily and heal thilyEveryone is welcome to take part in it. Those who perform excellently at the sports meeting will get prizes. But don' t take theresults so serously because taking part is more important than the result. Good luck to everyone!

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