A．(A) The accountant is to return 300,000 dollars to balance your account.

B．(B) The check has bounced because of insufficient fund in the account.

C．(C) The accountant has checked in for a conference on environmental protection.

D．(D) The check is specially provided to make a balance on your bank account.

钢结构构件的施涂顺序一般是（），以保持涂层的厚度均匀一致，不漏涂.不流坠为准。

A.先上后下、先易后难、先左后右、先内后外

B.先上后下、先难后易、先左后右、先内后外

C.先下后上、先难后易、先左后右、先内后外

D.先下后上、先易后难、先左后右、先内后外