问题
选择题
| 方程2x2-5x+2=0的两个根可分别作为（ ） |
A.一椭圆和一双曲线的离心率 B.两抛物线的离心率 C.一椭圆和一抛物线的离心率 D.椭圆的离心率 |
答案
答案：A
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| 方程2x2-5x+2=0的两个根可分别作为（ ） |
A.一椭圆和一双曲线的离心率 B.两抛物线的离心率 C.一椭圆和一抛物线的离心率 D.椭圆的离心率 |
答案：A
| 根据上下文，补全对话，将正确的选项填在横线上，有一项是多余的。 | |
| Mary; Are you hungry? Bob:1. ______ Mary:2. ______ Bob: No, thanks. I don't like chicken or rice. Mary: Would you like some noodles? Bob: Yes, please.3. ______ Mary:4. ________ Bob: I like chocolate and cake for dessert. Mary: What do you want to drink? Bob:5. _______ | A.I want somejuice to drink. B.No,thanks. C.My favourite food is noodles. D.Yes,I'm very hungry. E.What's for dessert? F.Would you like some chicken and rice? |