题目

—Dick has a bad cough because of smoking. —Why doesn’t he      ? A.give it up   B.give it in   C.give it out  D.give it away 答案:A 解析: 略设命题p:实数x满足(x-a)(x-3a)<0,其中a>0,命题q:实数x满足B={x|x-3x-2<0}.(Ⅰ)若a=1且p∧q为真,求实数x的取值范围; (Ⅱ)若q是p的充分不必要条件,求实数a的取值范围.
英语 试题推荐