B.his value to society
C.his attitude to environment
D.his capacity for working
B
(2015·江苏阜宁中学高三一模)It is generally believed that we are getting cleaned when we step under a shower. We are, but were also giving a home to lots of tiny little creatures we don’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 illness. 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.
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