软岩的特性是（）。
A、岩体变化慢
B、岩体强度高
C、不易风化
D、岩体强度低
参考答案：D
David is animal fur, so he won’t visit anyone who has cats or dogs in the house.
A．curious about
B．allergic to
C．satisfied with
D．food of
关节肿胀，僵硬，疼痛不移，肌肤紫暗或瘀斑等为（）
A.痰
B.瘀
C.湿
D.寒
E.热
