采用锚索支护时,各色树脂药卷的搅拌时间和等待凝固时间分别是红色药卷搅拌15秒,等待凝固不少于()秒。
A、40
B、50
C、60
参考答案:C
— Would you like _____ tea?
— Yes, and _____ milk, too. [ ]
A. much; any
B. some; any
C. some; some
D. many; some
在扩大波及体积方面,聚驱的机理是()作用。
A、绕流与吸附
B、绕流与粘滞
C、调剖与绕流
D、吸附与粘滞