题目

若的展开式中常数项为160，则__________． 答案：【答案】2【解析】由二项展开式的通项公式，先写出数列的第项，进而可求出结果.的展开式的第项为，令，则，所以，所以，故故答案为2—Do you have anything to say for yourselves?—Yes，there is one point________ we must insist on.A．whyB．whereC．howD．/