表示
We had every reason to believe that _____ 2010 World Expo in Shanghai would be _____ success.
We had every reason to believe that \_\_\_\__ 2010 World Expo in Shanghai would be \_\_\_\__ success.
Students are expected to _____ their classes regularly.
Students are expected to \_\_\_\__ their classes regularly.
If your new coat is too large, tailor can _____ it to fit you.
If your new coat is too large, tailor can \_\_\_\__ it to fit you.
用40米/秒的初速度从地面竖直上抛一个质量为0.2千克的物体,若不计空气阻力.求: (1)上抛几秒后物体的势能和动能相等; (2)在什么高度物体的势能是动能的两倍; (3)如果物体实际达到的最大高度是76米,物体在上升过程中,克服阻力做了多少功?所受平均阻力多大?
用40米/秒的初速度从地面竖直上抛一个质量为0.2千克的物体,若不计空气阻力.求: (1)上抛几秒后物体的势能和动能相等; (2)在什么高度物体的势能是动能的两倍; (3)如果物体实际达到的最大高度是76米,物体在上升过程中,克服阻力做了多少功?所受平均阻力多大?
Either my parents or my elder brother _____ going to water the garden.
Either my parents or my elder brother \_\_\_\__ going to water the garden.