--- ____________ my glasses? I can’t read without them.

--- I ____________ them on the desk, but they are not there now.

A．Have you seen; have seen

B．Have you seen; saw

C．Did you see; have seen

D．Did you see; saw

1万总吨及以上的每艘油船和7万总吨及以上的每艘其他船，其主操舵装置应设（）。

A.一台动力设备

B.两台相同的动力设备

C.三台相同的动力设备

D.两台或几台相同的动力设备