卵泡刺激素(FSH)和黄体生成激素(LH)直接控制卵巢的周期性变化。
参考答案：对
— The little girl _____ her seat to the old man on the crowded bus.
—What a kind girl![ ]
A. took
B. brought
C. borrowed
D. offered
肱骨髁上骨折最严重的并发症是（）。
A、桡神经损伤
B、肱动脉损伤
C、缺血性肌挛缩
D、肘内翻
E、骨化性肌炎
