沥青之所以称为柔性防水材料，主要取决于其（）。
A.黏滞性
B.塑性
C.温度稳定性
D.大气稳定性
参考答案：B
Is Mother Monkey ____________ home? [ ]
A. at
B. in
C. on
Changing direction by bringing the stern of the vessel through the eye of the wind is known as（）.
A.jibing
B.running before the wind
C.tacking
D.reefing
