【简答题】11 Perhaps, language should be looked upon as a road map and a valuable possession: often study the road map ( check grammar ) and tune up the car engine ( adjust vocabulary ). Learning grammar and a ...
【简答题】One day he went on a long way alone. Before he left home, his wife said, Now you have all these things. You need them on your way. Take care of your things on the way. He went to the station. He bough...
【单选题】如图 5.6.4 所示, 为一皮带传动装置,右轮半径为 r , a 为它边缘上一点;左侧是一轮轴,大轮半径为 4r ,小轮半径为 2r , b 点在小轮上,到小轮中心的距离为 r 。 c 点和 d 点分别位于小轮和大轮的边缘上。若传动过程中皮带不打滑,则 ()。 1 a 点和 b 点的线速度大小相等 2 a 点和 b 点的角速度大小相等 3 a 点和 c 点的线速度大小相等 4 a 点和 c 点的...
【简答题】Complete the following sentences by choosing words from those given to you. Probably you need to change the forms of the words you’ve chosen. industrialized sustainable survival surv...