一端为固定铰支座,另一端为可动铰支座的单梁是( )。
A.简支梁
B.连续梁
C.悬臂梁
D.桁架梁
参考答案:A
There is a lake _____ our library. [ ]
A. in front of
B. in the front of
C. at the front
D. at the front of
参与排卵的因素中下列哪项是错误的:()
A.成熟卵泡受LH的影响
B.LH/FSH峰值的出现
C.前列腺素增多
D.卵泡壁血管扩张
E.组胺减少