题目

用括号内所给单词的适当形式填空 1. _______more vegetables is good for your health. ( eat ) 2. We are ______ to win the game. ( excite ) 3. Would you mind ______ the window, it’s too cold outside. ( open ) 4. What about ______ to see a dentist? ( go ) 5. We should exercise often _____ us up. ( build ) 答案：1.Eating 2.excited 3.opening 4.going 5.to build 关于自由落体运动，下面说法正确的是 A．它是竖直向下，v0＝0，a＝g的匀加速直线运动 B．在开始连续的三个1 s内通过的位移之比是1∶3∶5 C．在开始连续的三个1 s末的速度大小之比是1∶2∶3 D．从开始运动起依次下落4.9 cm、9.8 cm、14.7 cm，所经历的时间之比为1∶∶