月经周期紊乱,或提前10天一行,或50天一至,或月经量多,可诊断为()
A.月经先期
B.月经后期
C.月经先后无定期
D.月经过多
E.经乱
参考答案:C, E
The_________look on his face suggested that he was satisfied with our work. [ ]
A. pleased
B. pleasure
C. pleasing
D. please
对脂肪和蛋白质消化作用最强的消化液是
A.唾液 B.胃液 C.胰液D.小肠液 E.胆汁