I ______ born in Shanghai.A. am B. are C_爱下问搜题

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问题选择题

I ______ born in Shanghai.

A. am
B. are
C. is
D. was

答案

答案：D

单项选择题

图3.6-26所示电路中Z点的频率为（）。

A.5Hz

B.10Hz

C.20Hz

D.25Hz

问答题简答题

织物在试织后需要收集哪些技术信息资料以便于修改？