管道疏通通法中一般疏通长度不超过()m。
A、30
B、40
C、35
D、45
参考答案:A
I _______ yesterday. [ ]
A. had my bike repair
B. had my bike repairs
C. had my bike repaired
D. has my bike repaired
情报传输的途径主要包括()。
A、协查通报
B、情况通报
C、传递
D、交流