在碘量法中,用淀粉作指示剂。淀粉指示剂是常用的()。
A.氧化还原指示剂
B.自身指示剂
C.吸附指示剂
D.专属指示剂
参考答案:D
Women are slightly more ______ to become infected with HIV without a condom during sex. [ ]
A. perhaps
B. possible
C. likely
D. probably
氯化钠溶液在生产、生活中都有广泛的用途。现配置1 L 0.2 mol·L-1 NaCl溶液。请回答问题。