使用（）运输货物时，要把车门.厢门关好。A.罐装车辆 B.敞篷车辆 C.厢式货车

如图所示，要让电流表能测L₁中的电流，需闭合开关______；要让电流表仅测量L₂中的电流，需闭合开关______；当S₁、S₂、S₃同时闭合时，电流表______（填“会”或“不会”）被烧坏．

常温下0.1mol•L^-1醋酸溶液的pH=a，下列能使溶液pH=（a+1）的措施是（　　）

A．将溶液稀释到原体积的10倍

B．加入适量的醋酸钠固体

C．加入等体积0.2 mol•L^-1盐酸

D．提高溶液的温度

____help doctors work in a hospital.         [ ]

A. Soldiers              

B. Teachers    

C. Nurses              

D. Farmers

动词填空（10分）

小题1:Can you tell me how            (make) a lantern.

小题2:Don’t go out. It             (rain) hard outside.

小题3:Mother asks me             (not play) football on the road.It’s very dangerous.

小题4:My father often              (drive) me to school .

小题5:It takes me an hour              (do)homework every day.

小题6:His brother looks forward to                (hear) from his parents.

小题7:How about               (wait)at the school gate.

小题8:Mike,             (not draw)on the wall.

小题9:I’d like to invite you               (watch) a football match.

小题10:I hope you             (show) me around your school.

副枪装置有哪些优点？