第19题: [单项选择]轻粉的鉴别特征是() A. 含氯化亚汞,为白色有光泽的鳞片或雪花状结晶,遇光色变黯 B. 含氯化亚汞,为白色雪花状结晶,气香 C. 不规则的块状,表面灰白色,夹有红、黄、蓝、黑等颜色的纹理,吸湿性强 D. 不规则的缺状,表面灰白色,夹有红、黄、蓝、黑等颜色的纹理,无吸湿性 E. 不规则的块状,表面灰白色,多光滑,无臭无味,舔之粘舌 参考答案:A
A. not often uniformly good B. sometimes very good C. never any good at the worst things D. at their best when given room 参考答案:A 答案解析:[分析] 本题考点为词义理解。文章第一段第一句话“Women are quite often competent drivers, but they are very seldom consisten