设Ａ、Ｂ两点的纵坐标分别为500m、600m，则纵坐标增量△XBA=100m。
参考答案：错
加热炉为什么要设防爆门？
In 1816, an apparently insignificant event in a remote part of Northern Europe ______ Europe into a bloody war.
A．imposed
B．plunged
C．pitched
D．inserted
