若发包人未按合同约定预付工程款,承包人应在预付时间到期后( )d内向发包人发出要求预付的通知。
A.7 B.10C.14 D.15
参考答案:B
The young man used to _______ to work,but he is used to _______to work now.
A.drive,walking.
B.drove,walked.
C.drive,walks.
D.driving,walk
水路系统在()Mpa压力下无漏水现象。
A、0.1
B、0.2
C、0.3