皮带接头处被碰挂，划破皮带，情况不严重的可以不用处理。（）
参考答案：错
某元素原子结构示意图为
，该原子最外层电子数X为______．该元素的单质在空气中燃烧的实验现象是______，生成物的化学式为______．
He suddenly saw Sue _____ the room. He pushed his way ____ the crowd of people to get to her.
A．across, across
B．over, through
C．over, into
D．across, through
