下列现象与惯性无关的是 [ ]
A.跳远运动员助跑一段距离才起跳
B.百米赛跑运动员到达终点不能马上停下来
C.举重运动员把杠铃举在空中不动
D.踢出去的足球继续向前飞行
答案:C
My mother was . I had to look after her . [ ]
A. in hospital, in hospital
B. in the hospital, in hospital
C. in hospital, in the hospital
D. in the hospital, in the hospital
下列建筑构件中( )是燃烧体。
A.木屋架
B.阻燃胶合板吊顶
C.水泥刨花板隔壁
D.阻燃处理的木材