铝的耐蚀性能较高，但塑性较差。

根据所给首字母和中文提示完成各句，使句意通顺。

1.There was adequate sunshine in Xinjiang this summer, a_________ for the extremely sweet grapes in this area.

2.The government expressed their apology to the victims in the explosion on Nov.2 in Fuquan, c_________ each a lot to the satisfaction of their families.

3.Doracy is coming to China, and he finds from the Internet that one pound e_________ more than ten yuan now.

4.Not r_________ to his fate, the statesman struggled to win the election by increasing the employment rate.

5.She s_______ her family life to her career，for it was her ambition at college to be a world-famous CEO.

6.Too long a time of _______ (暴露)to the sun does harm to our skin.

7.Engineers are researching ways to approach sources of _________ (替代的)energy for our next generations.

8.Under no _________ (情况) should such destruction be allowed to happen to historic sites.

9.With the use of solar energy, the company is now running _________  (顺利).

10.The Greek government is working hard to create more jobs for the _________ (失业的)people.

在一定体积的10%的氢氧化钠溶液中滴加10%的盐酸，反应中溶液的温度与加入盐酸的体积变化如下：

(1)试绘出溶液的温度与加入盐酸的体积之间的变化关系曲线。

  

(2)根据曲线讨论溶液温度变化的原因：    

①加入盐酸的量在2～10 mL之间时__________________________    

②加入盐酸的量在10～20 mL之间时__________________________    

(3)若某同学提出“将氢氧化钠固体直接与10%盐酸反应，以探究中和反应是否放热”，此提议是否合理？为什么？

斗轮机设有几种润滑方式？斗轮机各机构属于哪种润滑方式？

(2002，20)当事人订立合同，要约于( )时生效。

A．要约人发出要约

B．要约人将要约写成文字

C．要约到达受要约人

D．受要约人了解要约内容