落物卡的原因之一是()。
A.井口未装防落物保护装置
B.排量不足,洗井液携带能力差
C.注灰时间拖长或催凝剂用量过大
D.井壁坍塌造成套管变形或损坏
参考答案:A
Only by introducing scientific management, I suppose, ________ our company to a bright future and
make more profits in the next years.[ ]
A. can we bring
B. we have brought
C. we can bring
D. have we brought
次级类客户贷后检查至少()检查一次。
A.每半年
B.每季度
C.每月
D.每15天