It is generally believed that we are getting cleaned when we step under a shower. We are,

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 showerhead carries thousands of bacteria called Mycobacterium．These can cause problems like coughs and tiredness, and a general feeling of poorliness (身体不舒服). When you turn on the water, the bacteria go from the showerhead onto and into your body.
This is a finding of Norman R. Pace and his team at the University of Colorado, in the US. The scientists investigated bacteria in all kinds of human environment, including showers．Pace's team looked at 45 showerheads 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 showerhead 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.
Pace explained that he wanted to understand the natural microbial environments of public places. This kind of knowledge might help discover the microbes to be used in a bioterrorist (生物恐怖分子) attack.
【小题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 bathB．the showerhead carries many bacteria causing illness C．we don’t get cleaned while showeringD．we don’t get a weak immune system【小题2】According to the passage, which of the following is TRUE?A．Hot water could kill most of bacteria in showerheads.B．Of 45 showerheads surveyed in nine cities, 30 carried large amounts of Mycobacterium.C．Changing showerheads is the only way to avoid microorganisms.D．Shower water contains much less bacteria after being left to run for 30 seconds.【小题3】We can learn from the third paragraph that .A．having a shower in the morning is more dangerous than at other timeB．the bacteria always threat people’s health C．there is no reason to fear microorganisms for people with strong immune systemD．it is better to do some exercise in the morning than have a shower【小题4】The underlined word “pose” in the third paragraph probably means “ ”．A．cause B．avoid C．describeD．promise【小题5】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．B

(答案→)B 解析：文章介绍Norman R. Pace和他的团队发现的结果，大多数淋浴头含有致病的细菌，但是这不会对人的健康有危害，但是免疫力差的人要注意，他还研究了美国的地铁，结果发现，地铁里面的空气是新鲜的。【小题1】细节题：从文第一段的句子：A showerhead carries thousands of bacteria called Mycobacterium．These can cause problems like coughs and tiredness, and a general feeling of poorliness可知根据Norman R. Pace 的发现，我们在洗过澡后会感冒会咳嗽，因为淋浴头会携带很多致病的细菌，选B【小题2】细节题：从文章第四段的句子：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.可知淋浴水在流了30秒后，细菌就少多了。选D【小题3】推理题：从第三段的句子：Only those with a weak immune system might need to worry．可知对免疫力强的人没有必要害怕微生物，选C【小题4】猜词题：从第三段的句子：But Pace said that they pose few threats to the health．可知这些微生物对健康几乎不能造成威胁。所以pose相当于cause，所以选A【小题5】细节题：从文章第五段的句子：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.可知美国的地铁里面，火车的运动对新鲜空气是有帮助的，选A。

这个问题我还想问问老师呢