时间尺度
参考答案:
松弛时间与实验观察时间之比。《1时做黏性流体,》1时做弹性固体
Ed likes sports. [ ]
A. has
B. have
C. does
D. loves
Their tent,__________ light as a feather, remained firm in the storm last night.
A.as if
B.even
C.though
D.if