《中国药典》(2000年版)采用TLC高低浓度对比法检查盐酸氯丙嗪注射液中的"有关物质"。其方法是:取本品适量,加甲醇制成每lml含10mg的供试液;精密量取供试液适量,加甲醇制成每1ml含0.lmg的对照液。按规定方法各点样10μl进行检查,供试液中所显斑点与对照液主斑点比较,不得更深。其限量是
A. 0.1%
B. 0.01%
C. 1%
D. 0.001%
E. 0.0001%
混合展开剂中比例少的组分的作用是
A. 分离样品
B. 均衡组分极性
C. 使斑点集中
D. 提高分离度
E. 调节Rf值
______, Charles doesn't look happy.
A. For all his large bank account
B. Instead of his large bank account
C. However his large bank account
D. Let alone his large bank account
It can be inferred from the text that most people who have no doubts about paranormal phenomena are probably ______.
A. ignorant of what life really is
B. enthusiastic about mass media
C. inclined to believe things readily
D. fond of psychic powers themselves