熔体在流经狭窄的浇口时产生摩擦热,使熔体降温,有助于冲模。
参考答案:错
The teacher spoke so loudly as __ clearly in the crowded meeting hall.
A.to hear
B.to be heard
C.to listen
D.to be listened
(2013·高考福建卷)—Do you think George has passed the driving test?
—No.If so,he ________his car to our college yesterday.
A.would drive
B.drove
C.would have driven
D.had driven