单项选择题 We feel confident that you will agree that the quality of material ______ and the high standard of workmanship will appeal to the most ______ buyers． A．use, selectable B．used, selectable C．use, selective D．used, selective

单项选择题 在实际应用中，通常用正态分布来描述（）的分布。

单项选择题 冬眠合剂内含有(除葡萄糖外)( ) A．氯丙嗪、异丙嗪、哌替啶 B．氯丙嗪、异丙嗪、吗啡 C．氯丙嗪、异丙嗪、苯巴比妥 D．氯丙嗪、异丙嗪、司可巴比妥钠 E．氯丙嗪、异丙嗪、硫喷妥钠