试说运动损伤的原因.
参考答案:
1..思想认识不足
2..准备活动不充分
3.技术动作错误
4..运动负荷量过大
5.身体功能和心理状态不良
6.不良环境影响
不符合长江流域氏族聚落居民的生活状况的是 [ ]
A、饲养猪狗等家畜
B、种植粟等农作物
C、住干栏式房屋
D、主要种植水稻
He was unlucky because he failed the exam.
A.He was bad because he failed the exam.
B.He was lucky because he passed the exam.
C.He was unhappy because he failed the exam.
D.He was not lucky because he failed the exam.