Question

【題目】It is generally believed that we are getting cleaned when we step under a shower. We are, but we’re also giving a home to lots of tiny little creatures we didn’t even know about. A shower head carries thousands of bacteria called Mycobacterium. These can cause problems like coughs and tiredness, and a general feeling of being sick. When you turn on the water, the bacteria go from the shower head onto and into your body.

This is a finding of Norman R. Pace and his team at the University of Colorado, in the US. Pace's team looked at 45 shower heads in nine American cities. They discovered that 30 percent of them had large amounts of flying Mycobacterium.

But Pace said that they pose few threats to the health. Only those with a weak immune system might need to worry．He told the New York Times that the bacteria are not as unpleasant as might be thought. He said that having a shower is no more dangerous than anything else we do in the morning.

But for those who feel sick about the idea of all those microorganisms (微生物), he had some advice. Let the water run for 30 seconds before getting into the shower. Why? The number of bacteria is smaller than that when the water is just turned on. If that seems like a waste of water, he added that you could also change your shower head every few months.

However, Pace had good news too. He has also been testing the air in US subways. Apart from iron particles (粒子), which are ground off the track by the wheels of trains, subway air is fresh. The reason is that a train’s movement pumps fresh outdoor air into the tunnels.

【1】From the finding of Norman R. Pace, after taking a shower, we might cough or feel tired because ________.

A. it’s easy to get a cold when taking a bath

B. the shower head carries many bacteria causing illness

C. we don’t get cleaned while showering

D. we don’t get a weak immune system

【2】We can learn from the third paragraph that ________.

A. the bacteria always threat people’s health

B. there is no need to fear microorganisms for people with strong immune system.

C. the bacteria always threat people’s health when people have a shower

D. it is better to do some exercise in the morning than have a shower.

【3】What contributes to fresh air in US subways?

A. The train’s movement. B. Iron particles.

C. Train wheels. D. Air conditioners on the trains.

Answer 1

【答案】

【1】B

【2】B

【3】A

【解析】文章介紹Norman R. Pace和他的團(tuán)隊(duì)發(fā)現(xiàn)：大多數(shù)淋浴頭含有致病的細(xì)菌，但是這不會(huì)對(duì)人的健康有危害，但是免疫力差的人要注意；他還研究了美國的地鐵里的空氣狀況，結(jié)果發(fā)現(xiàn)，地鐵里面的空氣是新鮮的。

【1】B細(xì)節(jié)題。根據(jù)第一段中A showerhead carries thousands of bacteria called Mycobacterium. These can cause problems like coughs and tiredness, and a general feeling of poorliness可知，根據(jù)Norman R. Pace 的發(fā)現(xiàn)，我們?cè)谙催^澡后會(huì)感冒會(huì)咳嗽，是因?yàn)榱茉☆^攜帶了很多致病的細(xì)菌，故選B。

【2】B推理題。根據(jù)第三段中Only those with a weak immune system might need to worry.可知，免疫力強(qiáng)的人沒有必要害怕microorganisms，故選B。

【3】A細(xì)節(jié)題。根據(jù)第五段中Apart from iron particles (粒子), which are ground off the track by the wheels of trains, subway air is fresh. The reason is that a train’s movement pumps fresh outdoor air into the tunnels.可知，美國的地鐵里面，火車的運(yùn)動(dòng)會(huì)將新鮮空氣泵入軌道內(nèi)，故選A。