不属于抗战胜利原因的是[ ]
A．美苏的国际援助
B．海外华侨支援
C．日军自身力量弱小
D．中国全民族的坚持抗战
答案：C
闭经的不孕患者进行内分泌检查时，下列哪项是不必要的（）
A.FSH
B.LH
C.TSH
D.E2
E.P
On his way to the airport,it________him all of a sudden that he had forgotten his passport.[ ]
A．hit
B．knocked
C．occurred
D．beat
