题目

下列物质中属于盐的是() A . NaOH B . CO2 C . NaCl D . H2SO4 答案：C阅读理解阅读下列四篇短文，从每小题后所给的A、B、C、D四个选项中，选出最佳选项，并在答题卡上将该选项涂黑。Emergency rooms (ER) are supposed to cure people but Dr. John Stemgold wonders if working in an ER in Willits made him sick. The ER was downwind of the Remco chrome plant. “I used to sit facing that window and kind of daydream out the window, looking at Remco, looking at the fog coming out of there. Then I would cough and cough.” Stemgold said. What Dr.Stemgold didn’t know was that Remco was flowing out Chromium VI into the air--- a chemical known to cause cancer and breathing problems in humans. A recent state health department study found that people who were in Willits when Remco was in operation from 1964 to 1995 are at higher risk for cancer because of Chromium VI exposure. Today Dr.Stemgold has lots of time to play his guitar. It turns out he has a form of breathing difficulty. Hospital chemicals cause coughing so violently that he’s broken bones and it’s cost him his career. Others in this town believe the Chromium has made them sick, too, and their families. Actually, Chromium VI was classified as a carcinogen , a cancer-causing substance, thirty years ago, Twenty years ago, a group of state scientific specialists found no exposure level below which carcinogen effects would not have some probability of occurring. Still, Remco was allowed to flow out Chromium VI into the air. In the battle to balance public health and a healthy economy, laws often favor business, Alan Ramo is a professor of law at Golden Gate University. “There is a real drive to make money, to have employment. When there’s a real job that’s available and a theoretical risk of a chemical, jobs win out, business wins out.” And chemicals are allowed to flood the marketplace and the government requires strict testing before any drugs can be sold. But the vast majority of industrial chemicals are put into use little testing of any kind Chemicals that people like us, you and me might be exposed to. Marilyn Underwood is with California state health department. “ You need to have the convincing evidence that something is bad to then start regulating it.” However, in most cases, chemicals are not tested until someone reports the abnormal, unnatural condition of the environment in general. “I think that if people really knew what really goes on with environmental protection I think they would be shocked and they should be.” Says Professor Ramo. “It might be valuable for other people to know what has happened to me, not for me but for them.” He said “because they might be in a similar situation because of where they work.”1.What happened to the people who lived in Willits from 1964-1995?A. most of them were forced to move away.B. They earn a lot of fortune from the factory or the profit it brought about.C. employees from local area all got sick and lost their jobs at the plant.D. They have a greater chance of having severe disease.2.What can we infer from the scientists’ finding twenty years ago?A. Chromium VI surroundings help surgeons have more casual life.B. More skillful and capable doctors were needed.C. There is no safe level of Chromium VI exposure.D. A group of scientists were trying proper ways to solve the problems.3.When are new chemicals for industry tested?A. When they make smog-forming gases.B. When some problem is noticed.C. Ten years after they are first used.D. When the plant faces collapse.4.One of the important issues in the story is______.A. The dangers of emergency rooms that create health problem downwind.B. Doctors prescribing too many drugs.C. The battle to balance public health and a healthy economyD. Why scientists restricted chemical, like Chromium VI