单项选择题
Box函数返回值的类型为()
A.数值
B.字符串
C.变体
D.数值或字符串(视输入的数据而定)
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单项选择题
Due to Jason's help, I found my shoes ____ I had left them.
A.where
B.when
C.that
D.which
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单项选择题
题2.5图所示电路原处于稳态,t=0时开关闭合,则iC(0₊)=()。
A、5A
B、2A
C、3A
D、7A
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