混凝土的变形有两类,一类是受力变形,另一类是体积变形,以下()属于混凝土的体积变形。
A.徐变
B.收缩
C.膨胀
D.温度变形
E.裂纹
参考答案:B, C, D
Miss Smith often says “God helps those who help themselves”, intending to________ on us the significance of being independence.
A.base
B.urge
C.focus
D.rely
树木的被迫休眠