问题 填空题

汽车作为曾推动人类文明向前进步的产物,给人类生活带来舒适的同时,对环境的恶化也有难以推卸的责任,南方某市环境公报称:大气污染主要来源于汽车尾气。另据报道将氢气用于汽车发动机的技术已在我国研制成功,酒精作为燃料的汽车在北京试用,香港也大力推广汽车改用液化气作燃料。

(1)请写出汽车尾气中的一种大气污染物                                     

(2)请向这个市提一条治理汽车污染的合理化建议

                                                                          

答案

(1)一氧化氮 或一氧化碳

(2)限制汽车的数量;大力发展公共汽车的使用;汽车改用清洁环保型燃料;使用电力汽车‘汽车尾气使用催化净化装置处理后在排放(答案合理即可)

(1)一氧化氮或者一氧化碳都是汽车尾气的主要污染物;

(2)解决汽车污染的方法是少动用私家车,建议上下班步行或骑自行车代替汽车。

单项选择题
单项选择题

Questions 53 to 57 are based on the following passage: ( 10 分 )  How did a peddler of cheap shirts and fishing rods become the mightiest corporation in America The short version of Wal-Mart’s rise to glory goes something like this:in 1979 it racked-up a billion dollars in sales; by 1993 it did that much business in a week; by 2001 it could do it in a day.  It’s a shocking tale--one that propelled Wal-Mart from rural Arkansas, where it was founded in 1962, to the top of the Fortune 500. Sam Walton, Wal-Mart’s founder, pushed sales growth continuously while squeezing costs with sophisticated information technology. He exhorted employees to sell better with the "ten-foot rule" ( greet customers if they are that close ). He was, in other words, an early evangelist for the first commandment of today’s economy: service rules. Wal-Mart, in fact, is the first service company to rise to the top of the Fortune 500. When Fortune first published its list of the largest companies in America in 1995, Wal-Mart didn’t even exist. That year General Motors was America’s biggest company, and in every year that followed,either GM or another mighty industrial, Exxon, was No.1.  Wal-Mart’s achievement caps a bigger economic shift I from producing goods to providing services. Manufacturing’s share ofU. S. employment peaked in 1953, at 35%. It has been declining steadily since. In the decade that will end in 2010, the Bureau of Labor Statistics figures that goods-producing industries will create 1.3 million new jobs, compared to 20 million for service industries. To look at it another way, today there are about four times as many people working in service jobs as in other kinds of jobs. And even within manufacturing, services are an increasingly large share of operations.  As America got richer, consumption got more complicated. With more income to throw around, people started spending more on services -- movies and travel, mortgages to buy houses, insurance to protect those houses, the occasional weekends at a luxury hotel. Fortune calls this a shift in the demand pattern. Over the next few years, only three of the ten fastest-growing occupations ( software engineers, nurses, and computer support ) pay middle-class salaries. The rest could be called Wal-Mart kinds of jobs -- cashiers, retail assistants, food service, and so on. In short, the service economy is delivering more good jobs than ever before.

In 1993, Wal-Mart could have a sales volume of two billion dollars in __

A.one week

B.two weeks

C.one day

D. two days