以下哪项驱动制动带接合?()
A.蓄压阀
B.真空调制阀
C.调速阀
D.伺服活塞
E.延时阀
参考答案:D
质量m为5kg的物体在竖直向上的100N拉力F作用下由静止开始运动了5s,则
(1)物体5s末的速度v大小为多少m/s?
(2)物体在5s内上升的高度h为多少m?
(3)拉力F所做的功W为多少J?
(4)5s内拉力F的功率.P为多少W?
(5)5s末拉力F的功率P为多少W?
根据句意和汉语注释,写出单词的正确形式。
小题1:We can enjoy the beauty of the _____ (自然的) world in the countryside.
小题2:Write down all the ______________ (观光者)names here, please!
小题3:Do you want to learn something about the ____________(文化) of western countries?
小题4:People walk in all ______________(方向) after getting off the bus.