试分析魔丸运动时重心的变化以及能量的转换情况．
题型：问答题
问题：
试分析魔丸运动时重心的变化以及能量的转换情况．
题型：问答题
根据下图所示情景，补上短文中所缺单词或短语。
The 1 night Jim 2 very late(watched TV far into the night).When he 3 up in the morning, Jim found
that it was already 4 o'clock. He thought he would be 5 for school and felt very 6 . He 7 up quickly,
took his schoolbag and 8 to school without breakfast. When he 9 school, he found it was quiet and
nobody else had come. He realized it was 10 and he had made a mistake.
1.______ 2._____ 3._____ 4.______ 5._____
6.______ 7._____ 8._____ 9.______ 10._____
，求
。