[判断题] 判断题海拔4000m及以上地区野外作业每天不宜超过8h,隧道作业每天不宜超过6h。
A.正确
B.错误

When the steam engine was invented in the eighteenth century, it began one of the greatest revolutions that have ever happened in our world. The invention of the petrol engine at the end of the nineteenth century led to another enormous change in our lives. And the computer is almost certainly going to be no less important an invention than these engines were.
Just as there was a Stone Age, an Iron Age and so on, we have been living for centuries in a
Paper Age, during which almost all information was kept and sent on paper; and so much of it is wasted after it has been used once that enormous numbers of trees have to be cut down every year to provide us with paper. But now, with the computer, enormous amounts of information can be stored and sent without any paper at all, using small discs or the Internet.
Computers have also made it possible to do very difficult calculations very much faster than any earlier machine could. Computers also allow on
A. not so important as that of the steam and petrol engines
B. at least as important as that of the steam and petrol engines
C. less important than that of the steam and petrol engines
D. far more important than that of the steam and petrol engines