①分别画出一个平行四边形和一个三角形，使平行四边形的面积等于三角形面积的2倍。

②面一个梯形，它的面积是5平方厘米。

阅读下面材料，在空白处填入适当的内容(1个单词)或括号内单词的正确形式。

       Suppose you broke a cup or a bowl by accident, how would you deal with the brokenpieces? One day, Alice was washing ____(dish)．Suddenlyshe broke a beautiful plate ____(care)．Onhearing the sound, her father ran out of the study at once to see ____ his daughterwas hurt. ____ his relief, she was fine, so the father comforted her and toldher just to throw the broken pieces directly into the dustbin.

However,Alice said nothing.She picked up the pieces on the floor one by one.She evenlooked everywhere to make sure there were no pieces ____(leave)．Then Alice asked her father for someold newspapers and ____ plastic bag.

           The father felt confused.He wondered what she was going to do.After Alice____(wrap) the broken pieces with newspapers, she put ____(they) into theplastic bag, together with a card ____(say) “ Danger! Broken plate！” Finally, she placed the plastic baginto the dustbin.Not until then did the father realize how ____(consider) hisdaughter was.He learned a lesson from her!

设函数f（x）=（1﹣ax）ln（x+1）﹣bx，其中a和b是实数，曲线y=f（x）恒与x轴相切于坐标原点．

（1）求常数b的值；

（2）当0≤x≤1时，关于x的不等式f（x）≥0恒成立，求实数a的取值范围；

（3）求证：（$\frac{10001}{10000}$）^10000.4＜e＜（$\frac{1001}{1000}$）^1000.5．

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