婚姻法的法律规范可以分为以下三类()、禁止性规范、任意性规范(或称授权性规范)。
参考答案:义务性规范(或称肯定性规范)
—How do you find the new book by Mary?
—________. I guess she is out of her talent.
A.Very good
B.By accident
C.In the library
D.Very boring
液压挺柱也需要预留适当的气门间隙。