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4. Where has Peter done volunteer work?

A.       B.            C.

3. Where are they going on vacation?

A.        B.             C.

2. What are they going to do this Sunday?

A.          B.             C.

1. What’s the weather like?

(2)設且拋物線在點處的切線與軸的交點為，求的最小值和此時橢圓的方程。

吉安市高三第一次模擬考試理科數學試卷

，求的離心率；

(1)若的焦點恰好是的上焦點，且；過點