【单选题】If we ______ yesterday, we ______ the work.
A.
weren't interrupted... would finish
B.
didn't interrupt... would have finished
C.
hadn't interrupted... had finished
D.
hadn't been interrupted... would have finished
【单选题】—I'm not sure _____ there are living things on other planets or not. —Even scientists aren't sure about it. [ ]
【单选题】两个匀质圆盘A和B的密度分别为ρ A 和ρ B ,若ρ A >ρ B ,但两圆盘的质量与厚度相同,如两盘对通过盘心垂直于盘面轴的转动惯量各为J A 和J B ,则
【单选题】If we ______ day before yesterday, we would have done the job.
A.
hadn't been interrupted
B.
weren't being interrupted
C.
wouldn't be interrupted
【简答题】按涂料中是否含有颜料可分为 、 和 腻子三种类型。