3.已知絕對值不等式 ，則2a+b= ______ 。
4.某次考試，全班最高60分，最低20分，老師決定用一次函數轉換分數來加分，使原來20分者加分後變成60分，原來60分者加分後變成90分。若小興加分後為87分，則小興原來是______ 分。
5. 已知函數 ，上列函數何者為奇函數：______ 。
3. 已知對任意實數x，二次函數 的圖形恆在直線 的上方，求k的範圍______ 。
4. ，b 為a的小數部分，則a-b=______ 。
5. 兩正實數a，b滿足a2＋9b2＝9，試求（a＋3b）2的最大值為______ 。
【題組】 (2)A=3+√17、B=4+√10 、C=√11+√15______。
【題組】(2) x2+y2:______
【題組】(2) = 。
___________1.A: What did you do during your summer v n? B: I played sports and went
___________2.Winter is coming. The c t is good for the cold weather.
___________3.Peter is good at sports. He is a great v l player.
___________4.Everyone dies. No one can live f r.
___________5.A: Do your students ask q ns in class? B: Yes, they do.
___________6.The little boy is p r. He has no family. He needs some help.
___________7.Vests are 30% off today. They are very c p. We can buy some for our
___________8.History is Ted’s favorite s t. He learns a lot from the stories.
___________9.A: How do you learn English?B: I learn English t h movies and songs. Yo
___________10.The Chen family live on the second f r. It’s just downstairs (樓下).
二、寫出下列動詞的過去式：每題1分，共10分1. dance→ ___________
2. chat→ ___________
3. carry→ ___________
4. wrap → ___________
5. fall→ ___________
6. play→ ___________