唾液对龋病有免疫作用,可减少变形链球菌是因为其含有()
A.变酶
B.唾液小体
C.氨盐和硫氰酸盐
D.分泌型免疫球蛋白A(SIgA.
E.溶菌酶
参考答案:D
The reason why he failed is _____ he was too careless. [ ]
A. because
B. that
C. for
D. because of
治疗阴虚火旺证选用大补阴丸时,不宜加()
A.肉桂
B.天冬
C.牛膝
D.柴胡