下表是元素周期表中1～18号元素原子核外电子排布，我对它进行研究： （1）原子

同义句转换。

1. To learn English well is very important.

    _____ _____ very important _____ learn English well.

2. Kate began to study Chinese in 2004.

   It _____ _____ over two years since she began to study Chinese.

3."Are there homeless people in your city?"

   I asked Wang Tao. I asked Wang Tao _____ there _____ homeless people in his city.

4. Millions of people speak English as their second language.

    English _____ _____ by millions of people as their second language.

5. He doesn't know where he can find a pen pal.

   He doesn't know _____ _____ find a pen pal.

混合政策最大的优点就是其（）、（）和权变性。

汉译英：“外汇；外币；货币”，正确的翻译为( )。

A．currency；foreign currency；foreign exchange

B．foreign currency；currency；foreign exchange

C．foreign currency；foreign exchange；currency

D．foreign exchange；foreign currency；currency

现阶段我国规定，A股的配股权证不挂牌交易，不允许转托管。

钢中白点、制品中的裂纹、过烧等缺陷是属于（）。

A.不允许存在的缺陷

B.允许存在的缺陷

C.影响不大的缺陷

D.标准中没有明确规定