湿热瘀阻型克罗恩病方选：（）
A.白头翁汤
B.葛根芩连汤
C.大黄牡丹汤
D.龙胆泻肝汤
E.茵陈蒿汤
参考答案：E
The boy found _____ hard to get along with the other classmates. [ ]
A. it
B. that
C. this
D. them
330MW及以下汽轮都采用钢性联轴器。（）
