问题 选择题

今年我市恢复了初中化学实验操作考试,化学实验既要操作规范,更要保障安全。下列实验基本操作符合这一要求的是 

A.给液体加热

B.收集CO2并验满

C.闻气体气味

D.滴加液体

答案

答案:B

题目分析:给液体加热试管中的液体体积不能超过试管容积的三分之一;收集CO2并验满的方法是燃着的木条放在瓶口;闻气体气味应用手煽动,不可直接靠近闻气味;滴加液体时胶头滴管应垂直悬在试管口上方,不可插进试管内部。

点评:关于实验室的基本操作属于中考的必考题型,但是可以考的操作比较有限,应注意总结。

阅读理解

阅读理解。

       When someone gives you advice, listen without judgment, try to find value in what you're hearing, and

say:"Thank you". This wise advice is easy to understand yet hard to practice. I'll give you an example from

my life when I totally blew it in terms of practicing what I teach.

      In my work I travel constantly. I always put off going to the airport until the last second. My wife, Lyda,

was sitting next to me in the front seat. I was racing along and not paying much attention. Lyda cried out!

"Look out! There is a red light up ahead." 

      Being a trained behavioral science professional-who teaches others the value of encouraging advice-I

screamed at her:"I know there is a red light up ahead! Don't you think I can see?" When we arrived at the

airport, Lyda didn't speak to me. I wondered why she seemed mad at me.

      During the flight to New York, I did a cost-benefit analysis. I asked myself:"What was the cost of just

listening when Lyda called out the warning? Zero." I then reasoned:"What was the potential benefit? What

could have been saved?" Several potential benefits came to mind, including her life, my life, and the lives

of other people.

      I landed in New York feeling ashamed of myself. I immediately called Lyda and told her my cost-benefit

story. I convinced her:"The next time you help me with my driving, I am just going to say, 'Thank you.'"

      A few months passed, and I had long forgotten the incident. Again, I was racing off to the airport, when

Lyda cried out:"Look out for the red light!" I was embarrassed, and then shouted:"Thank you!" 

      I'm a long way from perfect, but I'm getting better. My suggestion is that you get in the habit of asking

the important people in your life how you can do things better. And be ready for an answer. Some people may

tell you things like "Look out for the red light." When this happens, remember that there is possibly some

potential benefit. Then just say:"Thank you."

1. What do we know about the author? [ ]

A. He is expert at behavioral science.

B. He is gifted in cost-benefit analysis.

C. He seldom takes his wife's advice.

D. He often runs the red traffic light.

2. The underlined part "blew it" in Paragraph 1 probably means "______". [     ]

A. became annoyed with the adviser

B. forgot the practical method

C. failed to say "Thank you"

D. lost personal judgment

3. It can be inferred from the passage that people ______.
[ ]

A. tend to be defensive when given advice

B. intend to follow others' suggestions

C. had better study behavioral science

D. should give their opinions patiently

4. The purpose of the passage is to advise people to ______. [ ]

A. do a cost-benefit analysis in daily life

B. treasure others' suggestions

C. learn from the author's experiences

D. discover potential benefits

问答题 论述题