钢铁的磷化会影响（）
A.抗拉强度
B.疲劳强度
C.弹性
D.塑性
参考答案：B
--- Does Li Hua serve in the army?
---No, but he________ in the army for three years.
A．served
B．has served
C．is serving
D．would serve
GnRH刺激试验(GnRHstimulationtest)
