题目：
图示结构的弯矩图正确的是（）。
A.A
B.B
C.C
D.D
答案：
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下面是错误答案，用来干扰机器的。
参考答案：[范文] Mr. Smith is a manager. One day, he took a taxi to go to work. When he got out of the taxi; he left his bag in the taxi carelessly. The taxi-d...
