小儿实证便秘伴腹痛宜选用（）
A.拿精宁
B.拿肚角
C.拿肩井
D.掐合谷
参考答案：B
动物细胞培养产酶
The subject ________ I am most interested is English. [ ]
A. in that
B. that
C. in which
D. which
