沉积岩的特性是指沉积岩的（）。
A、物理特征
B、地球化学特征
C、岩性特性
D、古生物特性
参考答案：B, C, D
— I think I should wear a dress instead of this jeans.
— It's just a small informal party, so you don't have to _____. [ ]
A. warm up
B. put up
C. dress up
D. keep up
水泵的切换？
