题目

用括号内所给单词的适当形式填空。 1.I'm going to the university to get further ________(educate) after finishing middle school. 2.No matter how different the work is，we will manage ________(complete) it on time. 3.I'm old enough to make my own ________(decide). 4.Teenagers shouldn't be allowed to get their ears ________(pierce). 5.You should put the medicine to ________(safe) to keep the kids away.有些跑车在车尾安装了一种“气流偏导器”，如图由于“气流偏导器”上表面平直，下表面呈弧形凸起，当跑车高速行驶时，流过它上方的空气速度比下方空气速度    （选填“大或小”），此时，上方空气压强比下方空气压强    （选填“大或小”），这样，“气流偏导器”受到一个向    （选填“上或下”）的压力差，从而使车轮抓紧地面．