2022年陕西5.3日高三联考文科综合试题答案

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短文改错As you may have heard, and Matthew Wood is in hospital right now. Yesterday, a drunk driver spedthrough the traffic light and hits his car. Luckily, he is recovering gradually from his injure. His wife is keepinghitInJurya watch over him there. The doctors say that he was not serious hurt, but they do want to keep him in theseriouslyhospital for a few day for observation. The department bought the healthy card for Matthew. The carayscirculating through the department right now for anyone A oi wants to sign it. We'll also prepare flowerswho wantingand a cake to him when he returns. If you want to see me during his stay in the hospital, visited hours arenImvIsItingfrom 4: 00 pm to 7: 00 pm.

4.(x2-x )°的展开式中x的系数为A.5B.6C.7D.15【试题解析】解法一：展开式中含x的项为：x2.Cox-xC。°x°=(6-1)x=5x2,所以x的系数为5，故选A.解法二：因为x2-x ( )°=(x 1) 1,所以展开式中含x的项为x2.Gx=5x,所以x的系数为5，故选A.