不产于四川的药材是（）
A.川牛膝
B.牛膝
C.川乌
D.附子
E.味连
参考答案：B
1. The pianos in the other shop will be ____,but ______ [ ]
A. cheaper;not as better
B. more cheap;not as better
C. cheaper; not as good
D. more cheap;not as good
呕血时，出血量超过多少可致循环障碍（失血性休克）（）
A.400ml
B.800ml
C.1000ml
D.1500ml
E.2000ml
