展开式中常数项为( ).A.11 B. C.8 D. 答案:【答案】B【解析】将看成一个整体,得到,再展开得到,分别取值得到答案.将看成一个整体,展开得到: 的展开式为:取 当时, 系数为: 当时, 系数为: 常数项为 故答案选B________ by the beauty of nature, the old men from Hong Kong decided to spend another three days on Mount Tai.
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A.Attracting
B.Attracted
C.To be attracted
D.Having attracted