在维生素C注射液中,抗氧剂亚硫酸钠对碘量法测定含量有干扰,能排除干扰的掩蔽剂是
A.甲醛
B.氰化钾
C.酒石酸
D.丙酮
E.草酸
参考答案:A,D
Didn’t ever occur to you what the source of this saying I just quoted is?
A.this
B.it
C.that
D.one