2022英语周报53YG答案

5.命题意图:本小题主要考查二项式定理、二项式展开式的通项公式、求指定项的系数等基础知识;考査运算求解能力、方程思想、应用意识答案C设二项展开式中含的系数为第 1项则T=C,(2G)…,(-x)=C数学(理工类)试題答案第1页(共10页)5-3得r=1,此时,T2x=-80x,所以展开式中x的系数为-80.

第四部分写作第一节短文改错Last Sunday, my friend and I go to a newly-opened supermarket and each of us bought awentnotebook to be used by our English learning. After that, we went to a restaurant nearby tohaving lunch. The prices were a bit steep, but we thought it would A worth it if the fohavegood. Sadly, we were disappointing We waited for our food for over thirty minute. Ourdisappointedminutessausages were burnt and very dry that we couldn t even cut them. His friends steak was evenworse. Moreover, the carpet was out of date and worn, the chairs were very uncomfortable butthe walls needed painting I think we'll neverthere again

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