单项选择题
A.Did you have No.4 cylinder repair B.Do you have No.4 cylinder repaired C.Didn’t you have No.4 cylinder repairing D.Didn’t you have No.4 cylinder repaired
Hardly had the engine started （） the temperature of the...
单项选择题Hardly had the engine started （） the temperature of the cooling water suddenly rose up to 40℃.
A.then B.than C.when D.after
The term “moderate speed” was previously interpreted as...
单项选择题The term “moderate speed” was previously interpreted as meaning a speed which would enable a vessel （）within half the range of visibility.
A.stopping B.being stopped C.to stop D.to be stopped
The two-stroke cycle begins with the piston coming up f...
单项选择题The two-stroke cycle begins with the piston coming up from the BDC, with the scavenging ports in the sides of the cylinders being （）.
A.open B.uncover C.covered D.closed
