下列物质可由金属与酸发生置换反应得到的是（ ） A．CuCl2 B．FeCl3

志愿者督导的行政功能主要目的是( )。

A．培养称职的志愿者

B．培养能干的志愿者

C．培养有效的志愿者

D．培养顺从的志愿者

E．培养有自信的志愿者

小明设计了如下图所示的实验装置来证明氧化铜能加快过氧化氢溶液的分解，并与相同条件下MnO₂的催化效果做比较，实验时间均以生成30 mL气体为准（即比较反应速率）。用图示装置测量产生气体的体积，其它可能影响实验因素均已忽略，相关数据如下：

（1） 检查图（I）装置气密性的方法是：               ；检查图（Ⅱ）装置气密性的方法是：               ；

（2） 图（Ⅱ）装置中油层的作用是                   。

（3）从设计原理看，实验中的“待测数据”可以是指                  。

（4）为了较准确地测量气体体积，在读取反应前后量气管中液面的读数的过程中，应注意                   （填字母编号）。

a．视线与凹液面最低处相平

b．读数前不能移动量气管和水准管

c．保持水准管静止，待水准管中液面不再上升时，立刻读数

d．读数前应上下移动水准管，待两管液面相平再读数

（5）如果要进一步探究CuO是否是该反应的催化剂，请完成下列实验。

对各型癫痫都有一定疗效的药物是（）

A.乙琥胺

B.苯妥英钠

C.卡马西平

D.丙戊酸钠

E.苯巴比妥

Statistics from China (1) be mind boggling: 1.2 billion (2) , 1.73 trillion cigarettes smoked in a year, 7,000 different (3) of woody plants. But amid all of these staggering sums, one factoid stands (4) for both its audacious size and for what it says about China’s future: there are 630 million Chinese under the age of 24. That’s a lot of (5) energy to burn. Materialism may be the (6) preoccupation among China’s young people these days, but just beneath the surface lies a feeling (7) wounded nationalist pride and an ever-deepening spiritual hunger. It isn’t clear where China’s young people are headed. But this is a generation that, by its (8) size and certain talents, will (9) the world’s destiny.
Here’s another sobering statistic: this is Terry McCarthy’s 22nd, and final, cover (10) for TIME Asia-he’s leaving the region (11) three years to become TIME’s Los Angeles (12) chief. McCarthy, who has indefatigably crisscrossed Asia out of his twin bases of Hong Kong and Shanghai, was the main driver (13) this week’s superb special report on young China. He developed the story list, guided much (14) the reporting
and wrote some of the articles. All (15) planning a swank black-tie masked ball last weekend in Shanghai. "I was (16) by the willingness of individual Chinese to write for us or talk about their (17) ," McCarthy says about the special (18) . "These are the guys (19) are going to be running the country in 20 (20) ." If we’re lucky, McCarthy will be back in the region long before then.

带煤气作业不应在雷雨天进行。（）