反渗透除盐中加酸调节进水PH值的目的是为了防止在膜表面上产生（）和膜的水解。
参考答案：碳酸盐水垢
That year his total income, with his reward ______, _______ 1500 dollars.[ ]
A.added up to; added
B. added; added to
C. added to; added up to
D. adds; adds up to
何种药物长时间喂饲后可引起动物肝癌发病率增加（）
A.细辛
B.柴胡
C.桂枝
D.麻黄
E.葛根
