《钢铁是怎样炼成的》这本书中哪句话是保尔人生的准则？在书中起什么作用？

用所给词的适当形式填空。

1. My parents got _____ (marry) in 1989.

2. It was a _____ (please) tour. We all had a _____ (wonder) time.

3. The dictionary is very _____ (use). It will help you a lot.

4. A tsunami (海啸) triggered by an earthquake hit the 

   countries on the Indian Ocean's rim from Indonesia to

   Somalia on Dec. 26th, 2004. Many people lost their _____ (life),

    and many people became _____ (home).

5. He's a _____ (luck) man who ran away from the disaster (灾难).

6. I have bought many _____ (education) CD--ROM and none of them _____ (be) good.

7. It sounds _____ (interest), dosen't it?

8. She is the _____ (design) of the game.

9. It is my _____ (two) day in Japan.

10. I have a _____ (love) purse.

将一块表面已被氧化成氧化钠的钠块投入水中，完全反应后收集到气体224mL（标准状况），得到100mL溶液，向上述溶液中逐滴滴加1mol•L^-1的稀盐酸30mL恰好完全中和。（1）写出钠与水发生反应的离子方程式，并标出电子转移的方向和数目。（2）计算所得NaOH溶液的物质的量浓度。（3）求钠块中氧化钠的质量分数。（请写出计算过程。）

喷吹粒煤与粉煤相比，喷吹条件要求（）。

A．富氧率高

B．富氧度基本相同

C．富氧率低

伤寒患者传染性最强的时期为（）。

A.潜伏期

B.起病1周内

C.起病2～4周后

D.恢复期

E.起病后1～2周内

皮样囊肿的叙述哪项错误（）。

A.是最常见的卵巢生殖细胞肿瘤

B.多见于青少年

C.单侧多见

D.肿瘤可含外、中、内三胚层组织

E.不会恶变