卵巢皮质内开始有大量密集成群的原始卵泡出现，是在下列哪个阶段
A．新生儿期
B．儿童期
C．青春期
D．更年期
E．老年期
参考答案：B
— Why does she always ask you for help?
— There is no one else _______, is there? [ ]
A. who to turn
B. she can turn to
C. for whom to turn
D. for her to turn
0.9%氯化钠50ml，10%葡萄糖50ml，张力为（）
A.2/3张
B.1/2张
C.1/5张
D.1/4张
E.等张
