汽车起重机液压系统工作时,液压油的温升不得超过()℃。
A、30
B、40
C、50
参考答案:B
---Could you_____ me this book please, Daniel?
--- Sorry, but I_____ it for only half an hour. I haven’t finished it.
A.lend; have had
B.borrow; have bought
C.borrow; have had
D.lend; bought
汽车(三轮汽车和低速货车除外)是否设置了(),其它机动车是否在左右至少各设置有一面后视镜,车长大于6m的平头货车和平头客车在车前是否至少设置有一面前下视镜。
A、规定数量的后视镜
B、规定类型的后视镜
C、规定数量和类型的后视镜
D、符合规定的后视镜