地质构造发生较大变化，致使工作条件或工作环境的突变，不需要修_爱下问搜题

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问题判断题

地质构造发生较大变化，致使工作条件或工作环境的突变，不需要修改作业定额。

答案

参考答案：错

完形填空

The earth is our home. We must take care of it. Life today is easier than it was years ago, but it has brought some new problems. One of the biggest problems is pollution（污染）. We can see it, smell it, drink it and even it. Man has polluted the . The more people, the more pollution.Many years ago, the problem was not so serious because there were not so people. When the land was used up (用光), the river was not clean in a place,man went to place. Now man is slowly polluting the whole world pollution is still the most serious, it’s bad for things in the world.Many countries don’t le t people burn for air in houses and factories in the city. Pollution by SO2 is now the most dangerous kind of pollution. It’s caused by heavy traffic. People say it’s to ride bikes. When you are , there is no pollution. But even in developed countries, most people don’t go to work by bike. It’s not bikes are expen sive or people are tired if they ride to work. It’s because the number of cars on the roads becomes larger. So more people their bikes and go to work by cars, then things are getting . We should have special roads only for bikes and make it difficult and expensive for drivers to take their cars into the city that they will go back to use their bikes.

A．somethingbad	B．badsomething
C．somethinggood	D．goodsomething

A．betterandbetter	B．moreandmore
C．worseandworse	D．biggerandbigger

单项选择题

（）年，美国首先研制成功第一台可编程控制器。

A.1969

B.1973

C.1979

D.1989