题目

第三节：完形填空（共20小题：每小题1.5分,满分30分） 阅读下面短文，从短文所给各题的四个选项（A、B、C和D）中，选出可以填入空白处的最佳选项。 For Senior 3 students, choosing which college to attend can be the most exciting and thrilling time in their entire school lives. This is also true for an American girl 21   Melanie. Melanie’s dad, James Porter, who is the chief of police for a Chicago suburb, wants Melanie to 22  nearby Northwestern University, where she’s 23  been accepted. But Melanie, 17,really wants to go to Georgeto 体积相等的木块和蜡块浮在水面上，木块排开的水重________于蜡块排开的水重；木块露出水的体积________于蜡块露出水的体积(ρ木＜ρ蜡)．