问题
填空题
下放钻具时，要眼看悬重表，控制（），防止（）。
答案
参考答案：下钻速度；突然遇阻
搜题请搜索小程序“爱下问搜题”
下放钻具时，要眼看悬重表，控制（），防止（）。
参考答案：下钻速度；突然遇阻
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| Mr Smith is a good teacher. He is 1 America. He teaches English. He is very friendly to 2 students. There 3 fifty students in his 4 . It is a big class. There are twenty-nine 5 in his class. The others are boys. Mr Smith and his students are good 6 , too. Now the school is over. Some of the students are 7 football on the playground (操场). Jane and Mary are cleaning the classroom. Two tall 8 are flying a kite over there. Mr Smith is playing with the 9 on the playground All of them 10 playing very happily. | ||||
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