与精液液化有关的酶是（）
A.ACP
B.ALP
C.LD
D.纤溶酶
E.柠檬酸脱氢酶
参考答案：D
某工程双代号网络计划如下图所示，其中工作G的最早开始时间为（）。
A.6
B.9
C.10
D.12
The work ________ by William Blake is a lovely volume of poems, presenting a happy world, though not without its evils and sufferings.
A．Songs of Innocence
B．Songs of Experience
C．Poetical Sketches
D．Lyrical Ballads
