2021-2022 英语周报 高考 6答案

12ACD【解析】若AM=AB+方AC,则点M是边BC的中点,故A正确;若AM=2AB-AC,即有AM-AB=AB-AC,即BM=CB,则点M在边CB的延长线上,故B错误;若A南=一B南一C应,即A+B+C击=0,则点M是△ABC的重心,故C正确;若AM=xAB+yAC,且x+y=2,可得2AM2xAB+2yAC,设AN=2AM,由图可得M为AN的中点,则△MBC的面积是△ABC面积的方,故D正确.故选ACD.

第二节Dear WangmingHow are you recently? I am sorry that I haven't written to you so long, ow my familycoronavirus hasntare very up. You must knowthe novbeen controlled effectivelysince it broke out in the US and so many people are being infected every day. So we dare notgo out because ofYou are lucky. When the novel coronavirus broke out in China, thegovernment took strong and effective measures and controlled its spread. There have been nolocal cases of infected people since September. China is great! Chinese people are lucky! Ireally regret coming here sometimes. I hope that I can return to our motherland as soon aspossibleFinally may you make great progress!LiHua.

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