开钻或穿越软硬不均匀土层交界处时,应缓慢钻进并保持钻杆()。
A.中线准确
B.稳固
C.垂直
参考答案:C
—What a traffic jam! I'm going to be late again.
—Yes. The traffic now is _____ than it used to be.[ ]
A. even better
B. a bit good
C. even worse
D. a bit bad
同行评审是一种通过作者的同行来确认缺陷和需要变更区域的检查方法,它主要分为管理评审、技术评审、过程评审和______。
A.误差评审 B.项目评审 C.文档评审 D.组织体系评审