侵蚀基准面
参考答案:
河流侵蚀河床底部岩石,使河床降低的作用,侵蚀基准面是下蚀作用的极限。
---Could I borrow your book for one night?
---_______. I won't use it tonight.[ ]
A. By all means
B. Never mind
C. You are welcome
D. Of course, you could
下列哪种物质是磷酸化的抑制剂
A.阿霉素B.氰化物C.鱼藤酮D.寡霉素E.抗霉素A