题目

用括号中所给单词的适当形式填空 1．Bonne is very ________(fun)and he is ________(friend)to others,too. 2．—Is this street as _______(quiet)as that street? —No,it is noisy. 3．Do you feel ________(well)today than yesterday? 4．He _______(true)cares about his friend's feeling. 5．Please speak _______(loud)so that everybody can hear you. 6．Anna sings ________(clearly)than Julie,while Julie dances better than Anna.阅读下面的材料，并解答问题：问题1：已知正数，有下列命题；；；根据以上三个命题所提供的规律猜想：______，以上规律可表示为a+b______问题2：建造一个容积为8立方米，深2米的长方形无盖水池，池底和池壁的造价分别为每平方米120元和80元．（1）设池长为x米，水池总造价为y（元），求y和x的函数关系式；（2）应用“问题1”题中的规律，求水池的最低造价．