国产日韩欧美一区二区三区三州_亚洲少妇熟女av_久久久久亚洲av国产精品_波多野结衣网站一区二区_亚洲欧美色片在线91_国产亚洲精品精品国产优播av_日本一区二区三区波多野结衣 _久久国产av不卡

?

What Makes You Tired

2021-09-10 07:22:44李楠
考試與評價·高二版 2021年3期
關(guān)鍵詞:李楠毒素

李楠

Here is an astonishing and significant fact: Mental work alone cant make us tired. It sounds absurd. But a year ago, scientists tried to find out how long the human brain could labor without reaching a stage of fatigue①. To the amazement of these scientists, they discovered that blood passing through the brain, when it is active, shows no fatigue at all! If we took a drop of blood from a day laborer, we would find it full of fatigue toxins②and fatigue products. But if we took blood from the brain of an Albert Einstein, it would show no fatigue toxins at the end of the day.

So far as the brain is concerned, it can work as well and swiftly at the end of eight or even twelve hours of effort as at the beginning. The brain is totally tireless. So what makes us tired?

Some scientists declare that most of our fatigue comes from our mental and emotional attitudes. One of Englands most outstanding scientists, J. A. Hadfield, says, “The greater part of the fatigue from which we suffer is of mental origin. In fact, fatigue of purely physical origin is rare.” Dr. Brill, a famous American scientist, goes even further. He declares, “One hundred percent of the fatigue of sitting worker in good health is due to emotional problems.”

What kinds of emotions make sitting workers tired? Joy? Satisfaction? No! A feeling of being bored, anger, anxiety, tenseness, worry, a feeling of not being appreciated—those are the emotions that tire sitting workers. Hard work by itself seldom causes fatigue. We get tired because our emotions produce nervousness in the body.

Choose the best answer.

1. What surprised the scientists a few years ago?

A. Fatigue toxins could hardly be found in a laborers blood.

B. Albert Einstein didnt feel worn out after a days work.

C. The brain could work for many hours without fatigue.

D. A mental workers blood was filled with fatigue toxins.

2. According to the author, which of the following can make sitting workers tired?

A. Challenging mental work.

B. Unpleasant emotions.

C. Endless tasks. D. Physical labor.

3. Whats the authors attitude towards the scientists idea?

A. He agrees with them.

B. He doubts them.

C. He argues against them.

D. He hesitates to accept them.

4. We can infer from the passage that in order to stay energetic, sitting workers need to

_______.

A. have some good food

B. enjoy their work

C. exercise regularly

D. discover fatigue toxins

注: ① fatigue? 疲勞? ② toxin? 毒素

猜你喜歡
李楠毒素
如何去除蔬菜中的毒素
在研究的路上鐫刻生命的印記
Taking Robotics, AI, IoT to the World
一類具有毒素的非均勻chemostat模型正解的存在性和唯一性
ON A MULTI-DELAY LOTKA-VOLTERRA PREDATOR-PREY MODEL WITH FEEDBACK CONTROLS AND PREY DIFFUSION?
毒蘑菇中毒素的研究進(jìn)展
Modeling of thermodynamics of ice and water in seasonal ice-covered reservoir *
Reverse motion characteristics of water-vapor mixture in supercavitating flow around a hydrofoil*
嚴(yán)苛標(biāo)準(zhǔn)方能清洗校園“毒素”
A型肉毒毒素聯(lián)合減張壓迫法在面部整形切口的應(yīng)用
登封市| 贵定县| 北票市| 本溪| 麦盖提县| 汉阴县| 南川市| 阿坝县| 南康市| 名山县| 深泽县| 凤台县| 竹北市| 慈溪市| 喜德县| 达孜县| 建水县| 云阳县| 平舆县| 砀山县| 万年县| 鄂托克旗| 渝中区| 泗水县| 呼和浩特市| 安远县| 张北县| 姚安县| 缙云县| 佛坪县| 金溪县| 新津县| 兴隆县| 永胜县| 兰溪市| 天峨县| 昂仁县| 宝清县| 平度市| 康平县| 文化|