常见的井下工程事故有：卡钻事故；钻具事故；钻头事故；落物事故；（）；顿钻事故；卡电缆、卡仪器事故。
参考答案：井喷及井喷失控事故
The teacher told his students that the earth _____ round the sun. [ ]
A. go
B. went
C. goes
D. had gone
五加皮的气味是（）
A.气微，味微甜后酸
B.气香，味苦而后甜
C.气微香，味微辣而苦
D.有败油气，味淡
E.有浓厚的香气，味苦、稍有麻舌感
