非合金是指不含合金量的金属材料。

下图表示在最适温度下，反应物浓度对唾液淀粉酶所催化的化学反应速率的影响。下列有关说法正确的是

A．若在A点时温度升高10℃，则反应速率加快

B．若在A点时温度降低10℃，则反应速率加快

C．若在B点时往混合物内加入少量唾液淀粉酶，则反应速率会加快

D．若在B点时往混合物内加入少量唾液淀粉酶，则反应速率不改变

在①熟石灰 ②苛性钠 ③石墨 ④活性炭 ⑤纯碱 ⑥盐酸⑦氢氧化铝等物质中，

（1）广泛用于造纸、制肥皂、石油等化学工业的是______；

（2）工业上用来净化某气体和液体的是______；

（3）农业上用来降低土壤酸性，改良土壤结构的是______；

（4）用作干电池电极的是______；

（5）用于除去热水瓶中的水垢的是______；

（6）用于治疗胃酸过多的药物的成分是______；（以上均填序号和化学式）

WASHINGTON, Sept. 23 — The House of Representatives, which prides itself on being " the People’s House" has been turning into, a rich men’s club.

The representatives newly elected in 1984 were almost four times as wealthy as the first term lawmakers elected only six years before, according to a new study on the members’ financial reports.

Behind this remarkable swing, the study says, there are two main factors: a court decision that outlawed limits on what candidates could give to their own campaigns, and the enormous growth in the cost of pursuing a seat in Congress. As a result, it is increasingly difficult for candidates of modest means, particularly women to amount successful challenges to entrenched office holders.

One solution, the authors contend, is a system of public financing for campaigns, but Congress seems in no mood to change the political rules any time soon.

"The lower chamber is going upper class," said Mark Green, the President of the Democracy Project, a public policy institute based in New York. ".But this evolution from a House of Representa­tives to a House of Lords denies the diversity of our democracy. It establishes a de facto property qual­ification for office that increasingly says: The people with low and middle income need not apply. "

The Democracy Project produced the study in cooperation with the United States Public Interests Research Group, a similar institute situated in Washington. But their research was not entirely theo­retical. In 1980 Mr. Green was the unsuccessful Democratic candidate for Congress in New York’s 15th District, in Manhattan. The winner was. Bill Green, one of the wealthiest members of Congress.

5. What can we know from the passage?

A. The House of Representatives is poor men’s club.

B. The House of Representatives was made up of people with low and middle income.

C. The House of Representatives, was rich men’s club;

D. The House of Representatives is made up of people with low and middle income.

6. What does "this remarkable swing" in the third paragraph refer to?

A. The House of Representatives prides itself on being" the people’s House".

B. The new study based on the members’ financial reports.

C. A court decision that outlawed limits on what candidates could give to their own campaigns.

D. The representatives elected now are much wealthier than those elected a few years ago.

7. Which of the following is wrong according to the study?

A. Any honest man can become a representative of the House.

B. Women are more difficult than men to be an entrenched office holder.

C. Limits on what a candidate could give to his campaign are outlawed.

D. One must spend much money getting a seat in the Congress.

8. What is the United States Public Interests Research Group like?

A. The House of Representatives.

B. A public policy institute based in New York.

C. A public policy institute based in Washington.

D. The House of Lords.

9. What does the writer think of the study?

A. Doubtful.        B. Believable.            C. Opposed.               D. Normal.

在Oracle环境中，怎样区分客户与服务器(选择一个最佳答案)？

A．通过实例与数据库进行区分

B．通过用户与用户进程进行区分

C．通过服务器进程与实例进行区分

D．通过用户进程与服务器进程进行区分

E．客户端．服务器的区分因执行周期的阶段而异

联合检测技术能够降低干扰，增大容量，降低功控要求，削弱远近效应。