1.单选题- (共2题)
2.选择题- (共1题)
Baloo the bear, Leo the Lion and Shere Khan the tiger have the most unusual and unlikely friendship between them. They were saved eight years ago, when they were cubs only two months old.
They were first sent to a rescue(救护)center, where they were raised together. Now they are in an American zoo. Because they came here as a kind of family, the zoo built a large clubhouse so that they could all sleep in it.
Now they have grown up. You can see them playing around like brothers. The three big animals seem to no sense(意识) of their animal differences.
Baloo and Shere Khan are very close. That is because they rise early, as Leo being a lion likes to spend most the day sleeping. When Leo wakes up the three of them mess around for most of the day before they settle down to some food. It is wonderful to see a giant American Black Bear put his arm around a Bengal tiger and then to see the tiger touch the bear with his nose lightly like a pet cat. You can often see they lie on top of each other for heat and for love.
“They are not wild animals any more. But you must remember who you are dealing with when you are with them,” said one of the zoo keepers.
3.填空题- (共1题)
4.解答题- (共4题)
(1)当t为何值时,PE∥AB;
(2)设△PEQ的面积为y(cm2),求y与t之间的函数关系式;
(3)是否存在某一时刻t,使

(4)连接PF,在上述运动过程中,五边形PFCDE的面积是否发生变化?说明理由

(1)请问这两种不同纪念品的成本分别是多少?
(2)如果商店购进1200个学生纪念品,第一周以每个10元的价格售出400个,第二周若按每个10元的价格仍可售出400个,但商店为了适当增加销量,决定降价销售(根据市场调查,单价每降低1元,可多售出100个,但售价不得低于进价),单价降低x元销售一周后,商店对剩余学生纪念品清仓处理,以每个4元的价格全部售出,如果这批纪念品共获利2500元,问第二周每个纪念品的销售价格为多少元?
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【1】题量占比
单选题:(2道)
选择题:(1道)
填空题:(1道)
解答题:(4道)
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【2】:难度分析
1星难题:0
2星难题:0
3星难题:0
4星难题:1
5星难题:0
6星难题:2
7星难题:0
8星难题:1
9星难题:3