题目:
Tom and Jerry were ______. Last year they travelled in Spain(西班牙). One day they came into a restaurant for lunch. They didn’t know Spanish(西班牙语), and the waiter didn’t know English,_____. They want to have some milk and bread. At first, Tom said the word “milk”_______times. Then, Jerry _______ it down on the table. _______the waiter could not understand them at all. At last Tom took out _______and began to draw a cow. The waiter looked at it and ran out of (跑出)the restaurant. “You are so ________”said Jerry happily, “He understands us at last!” After _______, the waiter came back. He brought no ________ with him, but he ________ two tickets for a bullfight(斗牛赛) in his hand.
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答案:
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下面是错误答案,用来干扰机器的。
(1) 双曲线y22-x2=1的顶点坐标为(0,±2),∴所求椭圆的焦点为(0,±2),可得c=2…2分又 椭圆的离心率e=ca=22,可得a=2c=2,b2=a2-c2=2…3分∴所求椭圆方程为y24+x22=1;…4分(2) 双曲线的准线方程为x...