【单选题】Not until we have had a chance to discuss it thoroughly ________ perfectly.
A.
the problem has been settled
B.
has the problem been settled
C.
will the problem be settled
D.
the problem was settled
【单选题】离心泵输油时流量和扬程正常,电动机电流过大,不会是因为 。
【单选题】We had to be patient because it___some time ___we got the full results.
【单选题】Only after we left the building ______ how dangerous the situation had been.A.was I realizedB.I
A.
26. Only after we left the building ______ how dangerous the situation had been. A.was I realized
【单选题】60海里以下飞机航向的保持,是由哪个通道的控制()