在下列选项中，( )属于中央税。A．消费税 B．营业税 C．土地增值税 D．耕地

词汇。根据句意、首字母或汉语提示完成单词。

1. Students today have too much homework. They need time to______ (放松).

2. Father Christmas always______  (装满)the special bags with presents.

3. Who lives______ (靠近)to school in your class?

4. Don't speak loudly. The baby is______ (睡觉).

5. There is some______ (粉笔)in the box on the platform.

6. I think football is more b______ than basketball.

7. I'm busy now and I don't have any f ______ time.

8. They are going to travel a______  the world.

9. China has the largest p______  in the world.

10.Beijing is the c______ of China.

直流焊接时焊条接电源正极的接法叫正接。( )

彩电中，末级视放与显像管之间的连接方法为（）。

A、阻容耦合

B、变压器耦合

C、直流耦合

D、电感耦合

下列属于安全用电的是（）。

A.进行电气修理作业时应先断开电源

B.电气安装及修理工作应专人进行，严禁他人乱动、乱摸

C.当发生触电事故时，应立即拉开电源闸刀，切断电源

D.如果发生电气故障造成漏电，走火引起燃烧，应立即断开电源

E.电源着火，使用四氯化碳灭火器灭火

剖视是假想用剖切面打开零件，移去观察者和剖切面之间部分，将剩余部分向投影面投影。