M=（a2aa5bbn）5，则M等于[ ] A．a40b5n+1 B．a40b5_爱下问搜题

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问题选择题

M=（a²aa⁵bbⁿ）⁵，则M等于[ ]

A．a⁴⁰b⁵ⁿ⁺¹

B．a⁴⁰b⁵ⁿ⁺⁵

C．a³⁵b⁵ⁿ

D．a³⁵b⁵ⁿ⁺⁵

答案

答案：B

判断题

城市居民委员会是行政机关。

选择题

Liu Xiang won a gold medal at the 2004 Athens Olympics. He _____ everyone. [ ]

A. surprises

B. surprising

C. surprised

D. surprise