问题
单项选择题
当矿井工业场地布置有主、副井两个井筒时，对于井筒的施工顺序，我国多采用()的方式。
A.主井比副井先开工
B.副井比主井先开工
C.主井与副井同时开工
D.主井与副井交替开工
答案
参考答案：A
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当矿井工业场地布置有主、副井两个井筒时，对于井筒的施工顺序，我国多采用()的方式。
A.主井比副井先开工
B.副井比主井先开工
C.主井与副井同时开工
D.主井与副井交替开工
参考答案：A
Jim is a boy who thinks a lot and learns a lot. One day when he was passing the elephants, he suddenly stopped. He saw a group of elephants and these big animals had a rope around their front . The rope was very , so the elephants could break it easily. But to his surprise, did not. Jim saw a trainer near the elephants. Then he walked over and asked him . “Well,” the trainer said, “When they were very young and much smaller , we used the same ropes to tie around their legs and, at that age, they were sure they hold(约束)them. As they get bigger and bigger, thy still believe the ropes can hold them, so they try to get away.” Jim thought a lot that. These animals could break their ropes at any time, but because they they couldn’t, they didn’t give it a try. Like the many of us believe that we can’t do something in our life, just because we didn’t do it successfully in the past.
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