胃痛的基本病机是
A．胃气失和
B．胃气阻滞
C．胃络瘀阻
D．胃失所养
E．以上均是
参考答案：B,C,D
18世纪，清朝定了大小和卓叛乱，重新统一了[ ]
A．新疆
B．西藏
C．青海
D．宁夏
Until recently historians assumed that calendars ________ with the advent of agriculture.[ ]
A. came to existence
B. came to exist
C. were existed
D. were existential
