问题 选择题

有三种金属M、N、R,其氧化物中只有N的氧化物溶于水,且水溶液pH大于7;又知R能从硝酸银溶液中置换出银,R不溶于盐酸;M能在氧气中剧烈燃烧,火星四溅,生成黑色固体.则M、N、R在金属活动顺序表中的正确位置是(  )

A.M、N、(H)、R

B.R、M、(H)、N

C.R、(H)、M、N

D.N、M、(H)、R

答案

本题充分考察了金属活动性规律知识,依题意可知,N的氧化物的水溶液pH值大于7,说明N的金属性较强,排在金属活动顺序表的靠前位置;R能从硝酸银溶液中将银置换出来,说明R元素活泼性较强,但R不溶于盐酸,则可知R在H元素后面;通过实验现象可知M为铁元素,由此推出M、N、R三种金属元素的顺序为:N、M、(H)、R.

故选D.

填空题
阅读理解

阅读理解。

     Odland remembers like it was yesterday working in an expensive French restaurant in Denver. The ice

cream he was serving fell onto the white dress of a rich and important woman.

     Thirty years have passed, but Odland can't get the memory out of his mind, nor the woman's kind reaction

(反应). She was shocked, regained calmness and, in a kind voice, told the young Odland, "It's OK. It wasn't

your fault." When she left the restaurant, she also left the future Fortune 500CEO (总裁) with a life lesson:

You can tell a lot about a person by the way he or she treats the waiter.

     Odland isn't the only CEO to have made this discovery. Rather, it seems to be one of those few laws of the

land that every CEO learns on the way up. It's hard to get a dozen CEOs to agree about anything, but most

agree with the Waiter Rule. They say how others treat the CEO says nothing. But how others treat the waiter

is like a window into the soul.

     Watch out for anyone who pulls out the power card to say something like, "I could buy this p[lace and fir

you," or "I know the owner and I could have you fired." Those who say such things have shown more about

their character(人品) than about their wealth and power.

     The CEO who came up with it, or at least first wrote it down, is Raytheon CEO Bill Swanson. He wrote

a best-selling book called Swanson's Unwritten Rules of Management.

     "A person who is nice to you but rude to the waiter, or to others, is not a nice person," Swanson says, "I

will never offer a job to the person who is sweet to the boss but rude to someone cleaning the tables."

1. What happened after Odland dropped the ice cream onto the woman's dress?

A. He was fired.

B. He was blamed.

C. The woman comforted him.

D. The woman left the restaurant at once.

2. Odland learned one of his life lessons from _______.

A. his experience as a waiter

B. the advice given by the CEOs

C. an article in Fortune

D. an interesting best-selling book

3. According to the text, most CEOs have the same opinion about _______.

A. Fortune 500 companies

B. the Management Rules

C. Swanson's book

D. the Waiter Rule

4. From the text we can learn that ______.

A. one should be nicer to important people

B. CEOs often show their power before others

C. one should respect others no matter who they are

D. CEOs often have meals in expensive restaurants