问题 问答题

在“探究平面镜成像的特点”实验中,某同学用玻璃板、两个相同的棋子A及B、刻度尺、白纸等器材进行实验.

(1)实验时玻璃板应该______放置在水平桌面上.

(2)将棋子A放在玻璃板的一侧,则棋子B应放在______(A的同侧/A的另一侧).

(3)一边移动棋子B,眼睛一边透过玻璃板观察,当______便停止移动棋子B,B的位置即为棋子A像的位置.

(4)用刻度尺测量B到玻璃板的距离及______,进行比较.

(5)为了检验像是否是虚像,应采取的具体操作步骤是______.

答案

(1)实验时玻璃板应该竖直放置在水平桌面上.

(2)将棋子A放在玻璃板的一侧,则棋子B应放在A的另一侧.

(3)一边移动棋子B,眼睛一边透过玻璃板观察,当B与A的像完全重合时便停止移动棋子B,B的位置即为棋子A像的位置.

(4)用刻度尺测量B到玻璃板的距离及 A到玻璃板的距离,进行比较.

(5)为了检验像是否是虚像,应采取的具体操作步骤是移去棋子B,在B的位置放一张白纸,用眼睛直接观察白纸,看纸上是否有A的像.

故本题答案为:(1)竖直;(2)A的另一侧;

(3)B与A的像完全重合时;(4)A到玻璃板的距离;

(5)移去棋子B,在B的位置放一张白纸,用眼睛直接观察白纸,看纸上是否有A的像.

阅读理解

One would have to be a fool to overlook (忽视)the importance of using positive(积极的) thinking for you rather than allowing negative thinking to work against you. In recent years, research in psychopharmacology (精神药理学) has proved what many people have known over the centuries: a positive attitude is good for you, good for your health, good for your wealth, good for everything. Researchers found that a positive attitude produces a specific chemical reaction which makes people feel better, while negative thinking results in a decline of hormone (荷尔蒙) and shuts down the immune (免疫的) system. This leads to illness and depression. Positive thoughts will make you feel better. Even if you must begin by literally forcing yourself to be positive (faking it, so to speak), it will become contagious (会传播的) and the positive thoughts will generate nice little chemicals and good feelings which will reinforce the positive thoughts.

For example, if you force yourself to smile or laugh, even when you don't feel like smiling or laughing, if you keep at it for a few minutes, you will soon feel like it. Feelings can generate (导致)thoughts, but thoughts can also generate feelings. Control your thoughts and you can control your feelings. Positive thinking is important in all aspects of our lives. There is probably no single factor more important in determining your success in achieving your career objectives than your own attitude.

It's often been said that in the land of the blind, the one-eyed man is king. And in the office of militant (好战) negativism, the positive workers shine like gold. You cannot control external events, but you can learn to control your reaction to those events and thereby have a positive attitude and be happy. This vital key to success is totally within your control. Use it.

小题1:We can infer from the passage that         .

A.positive thinking can cure you of your diseases

B.positive thinking can easily be generated by anyone

C.a decline of hormone may cause you to be depressed

D.a specific chemical reaction is the cause of negative thinking小题2:According to the passage, which of the following is true?

A.Feeling and thoughts can generate each other.

B.It's easier to control thoughts than to control feelings.

C.Your success depends wholly on your attitude.

D.Keeping smiling will surely make you successful.小题3:Just like a one-eyed man in the land of the blind, you should             .

A.control your feeling to what is happening to you

B.be king in your office

C.pay no attention to what is going on around you

D.take positive attitude in the office of militant negativism小题4:The best title to the passage is             .

A.The Bad Effect of Negative Thinking

B.Why Should People Think

C.Thinking: The Vital Way

D.Positive Thinking Benefits People

单项选择题 A1/A2型题