The house _____ big trees _____ an old m

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问题选择题

The house _____ big trees _____ an old man, who died several years ago.

A. is surrounded with; belong to
B. surrounding; belonging to
C. surrounded by; belongs to
D. surrounded; was belonged to

答案

答案：C

单项选择题

在正弦电路中R、L串联，且R≠0，L≠0时，以电流I为参考相量，其与总电压相位差的范围是（）。

A.0＜＜90°

B.＝90°

C.＝－90°

D.－90°＜＜0°

单项选择题

下面程序的结果是( )。
#include＜iostream.h＞
void main()char *str;
str="test!";
cout＜＜str[5];

A．程序错误

B．!

C．'\0'

D．为空字符