问题
填空题
椭圆x2+my2=1的焦点在y轴上，长轴长是短轴长的两倍，则m的值为______．
答案
方程x2+my2=1变为x2+
=1y2 1 m
∵焦点在y轴上，长轴长是短轴长的两倍，
∴
=2，解得m=1 m 1 4
故应填1 4
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椭圆x2+my2=1的焦点在y轴上，长轴长是短轴长的两倍，则m的值为______．
方程x2+my2=1变为x2+
=1y2 1 m
∵焦点在y轴上，长轴长是短轴长的两倍，
∴
=2，解得m=1 m 1 4
故应填1 4
| 阅读理解。 | ||||||||||||||||||
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| 1.You want to eat fish for supper, so you can go to______. | ||||||||||||||||||
| A. Orient Fishing Port Restaurant B. Tiantan Fishing Port Restaurant C. both A and B | ||||||||||||||||||
| 2. Some Japanese want to eat Japanese food, but they wonder if there is a great,so they should dial______to make sure. | ||||||||||||||||||
| A.6236655 B.6587777 C.6640073 | ||||||||||||||||||
| 3. Uncle Wang is a taxi driver. At midnight he is often hungry, so he can go to______to eat something. | ||||||||||||||||||
| A. Tiantan Fishing Port Restaurant B. Jing Jing Seafood. C Orient Fishing Port Restaurant | ||||||||||||||||||
| 4. Mrs. King wants to ask for some dumplings for lunch, so she can dial______. | ||||||||||||||||||
| A.6640073 B.6712418 C.6640093 | ||||||||||||||||||
| 5. You can't go to______in the morning to eat food. | ||||||||||||||||||
| A.Jing Jing Seafood B.Japanese Restaurant C. Dada Dumpling Restaurant |