如图所示,升降机以 1m/s 的速度匀速上升时,升降机对人的支持 500 N .下列说法正确的是( ) A. 升降机静止在十楼时对人的支持力小于 500 N B. 升降机以 1.5 m /s 速度匀速上升时对人的支持力大于 500 N C. 升降机以 2m/s 速度匀速下降时对人的支持力等于 500 N D. 升降机以 1 m /s 速度匀速下降时对人的支持力小于 500 N
【判断题】Judge the similar meaning of the couple sentences. There’s very little you can do to learn about an occupation through the Internet. You can learn about the job either in print resources or online; mo...
【判断题】Judge the similar meaning of the couple sentences. There’s very little you can do to learn about an occupation through the Internet. You can learn about the job either in print resources or online; mo...
【多选题】Complete the sentences with the given verbs . agree, get, give, judge, lose, make, set, solve 1 A life coach helps people to their problems. 2 Do you success by happiness or by money? 3 He helped...