空载和有载水平运行或有载向下运行自动人行道的制停距离应在下列范围之间:()
A.0.35~1.30m
B.0.30~1.40
C.0.30~1.30m:
参考答案:C
A fire broke out last night, _______ three children and two adults.
A.killed
B.killing
C.kill
D.to kill
根据输送介质的不同,装油臂可用()、低温钢、不锈钢或聚四氟乙烯衬碳钢制造。
A.碳钢
B.铁皮
C.铝合金
D.塑胶