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【简答题】
已知F 1 ，F 2 是椭圆 的两焦点，过点F 2 的直线交椭圆于A，B两点．在 △AF 1 B中，若有两边之和是10，则第三边的长度为
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【简答题】阅读理解。 Happy Sunday It is Sunday. Mary, Susan, Bob and I are at the zoo. We see birds, horses, bears and monkeys. The monkeys are very funny. We look at them and they look at us. They take some bananas...
【简答题】30钢轴套Φ50h6，Ra0.2μm，表面淬火，其加工方案是：（）。
【单选题】Bob: “Susan, I can't get my old job back. It's a lost cause.” Susan s reply:
A.
“Lost? Maybe I can help you find it."
B.
“Yes，I know it's not a good cause."
C.
“I understand. You'll find something else.”
【简答题】阅读短文，完成各题。 Happy Sunday It is Sunday. Mary, Susan, Bob and I are at the zoo. We see birds, horses, bears and monkeys. The monkeys are very funny. We look at them and they look at us. They take some ba...
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