等离子弧切割有（）方法。A、普通等离子弧切割 B、水再压缩等离子弧切割 C、空气等离

Yucai Middle School will have a School Day on Friday．Students don't need to have any classes．Instead，they are going to do a lot of things for fun．Here is a poster for it．

The most wonderful game of the year

Meet our school basketball stars

Basketball Court 3:00 p.m．— 5:00 p.m．

Tel：375 — 7682

 Water Sports

It's really cool!

Xingsha Beach The whole afternoon

Tel：375 — 7442

Talent Show

Are you good at singing，dancing，acting or playing the guitar?

Come and show yourself!

Music Hall 7:00 p.m．— 9:00 p.m．

Tel：375 — 9876

Chess is fun!

Different kinds of chess

Who will win at last?

Chess Club  8:00 a.m．— 10:30 a.m．1:00 p.m．— 3:30 p.m．

Tel：375 — 7465

For further information，please call the school office．Just do it! Enjoy yourself!

小题1:You can _______  in the morning or in the afternoon．

A．have the chess competition

B．go to the talent show

C．watch the basketball game

D．have water sports小题2:If you want to see the school basketball stars，you can go at _______．

A．8:00 a.m．— 10:30 a.m．

B．3:00 p.m．— 5:00 p.m．

C．1:00 p.m．— 3:00 p.m．

D．7:00 p.m．— 9:00 p.m．小题3:You can have water sports _______．

A．at Xingsha Beach

B．at the music hall

C．at the basketball court

D．at the chess club小题4:If you are good at singing and dancing，you should call at _______．

A．375-7682

B．375-7442

C．375-9876

D．375-7465小题5:If you want to learn about further information，what should you do?

A．See the poster．

B．Ask your classmates．

C．Call the school office．

D．Go to the school office．

从甲地到乙地一天共有A、B两班车，由于雨雪天气的影响，一段时间内A班车正点到达乙地的概率为0.7，B班车正点到达乙地的概率为0.75．

（1）有三位游客分别乘坐三天的A班车，从甲地到乙地，求其中恰有两名游客正点到达的概率（答案用数字表示）．

（2）有两位游客分别乘坐A、B班车，从甲地到乙地，求其中至少有1人正点到达的概率（答案用数字表示）．

自身免疫

涉密单位应对聘用的保安和临时工进行保密教育培训。

社会信用管理完善的()是建设现代市场体系的必要条件，也是规范市场经济秩序的治本之策。

A.社会信用制度

B.社会管理制度

C.资金融通制度

D.经济补偿制度