冷弯使钢材内易产生较大应力,并导致较大()变形。
A、回弹
B、冷
C、拉伸
D、压缩
参考答案:C
—Do you like to go to school _________?
—No. I ________ to school every day. [ ]
A. by cars, take a bus
B. by foot, take a bus
C. in a car, take a bus
D. on a bus, take the subway
主风机试车时,油压()时,应使辅助油泵重新工作。
A.p≤0.07MPa
B.p≥0.15MPa
C.p≤0.08MPa
D.p≤0.05MPa