气体的粘度表示什么?
参考答案:
表示由于气体分子或质点之间存在吸引力和摩擦力而阻碍质点相互位移的特性。
用单词的正确形式填空(共10小题;每小题1分,满分10分)
小题1:The b________(入室盗窃)in the area have risen by 5%.
小题2:It is ________(违法的)to drive without a license.
小题3:Would p________(参赛者)in the next race come forward?
小题4:We should help the boy ________(沉迷)to computer games.
小题5:The best ________(疗法)for a cold is to rest and drink more water.
小题6:She came home so thin and weak that even her own children hardly r________ her.
小题7:I was for the plan,but he d________ to it.
小题8:Smoking is b________ in some public places,such as on the bus and at the cinema.
小题9:The old soldier used all he had to buy a pack of c________(烟).
小题10:They’ve r________ the prices in the shop,so it’s a good time to buy.
分压式射极偏置放大器的输出电阻等于集电极电阻Rc。