小题1:.What can you know from Sign(1)?

A．We can’t smoke here

B．We can’t skate here

C．We can’t wash clothes here

D．We can do shopping here小题2:. From sign (1)we also know we can not______ here.

A．stay for long

B．fish

C．throw dirty things

D．go boating小题3:  From Sign ( 2 )we know we can _________here.

A．play computer games

B．stay ovenight

C．have something to eat

D．have a good sleep小题4:  Sign (2)means________.

A．food can’t be eaten right away

B．the cold sandwiches are for home cooking

C．the lost keys may be found here

D．you can take your food away小题5:  Sign(3)means you can______here.

A．have breakfast on Saturday

B．have dinner at 10:00 P .M . on Monday

C．have dinner every day

D．have something at 10:30 P . M . on Tuesday

液压泵盖在修理中，不应破环端面与轴孔中心线的互相（）的要求。

A、平行

B、垂直

C、倾斜

D、装配