糖尿病的中医病机是（）
A.阴津亏损、湿热偏胜
B.阴津亏损、燥热偏胜
C.气阴两亏
D.气滞血瘀
E.肝肾阴亏
参考答案：B
.Before she came to England, she had never heard a single English word ___________.
A．speaking
B．spoken
C．to speak
D．speak
模型飞机在正常飞行时所受的力有：（）、阻力、（）和拉力。
