步长肝康宁片是（）
A.中药保护品种
B.来源于蒙古族草药
C.国家一类新药
D.国际发明专利
参考答案：A
Personally I think it is the sales manager, rather than the sales girls, _____ to blame.[ ]
A. is
B. that is
C. are
D. who are
简述土壤含水率的测定方法。
