–Do you know __________tomorrow?

--At 8 o’clock.

A．when did Sally come

B．when Sally came

C．when will Sally come

D．when Sally will come

所有管道接驳位外露螺纹及管身或配件镀锌层受损之处，应在涂其它漆油前涂上什么作保护？

A.黑油 

B.高含锌量底漆 

C.白油