天然气作为一种较为安全的燃气之一,它不含有CO,较空气轻,一旦泄漏,立即会向上扩散,不宜积聚形成爆炸性气体。()
参考答案:对
读图,回答问题.
(1)A处的地形部位是______,位于村庄的______方向.
(2)B点的海拔是______米,B点与C点的相对高度是______米.
(3)根据因地制宜与可持续发展的原则,甲区域最适宜______.
A、修建房子B、植树造林C、水产养殖
(4)下列地形剖面图中,最能反映沿DE线地表起伏状况的是______.
What you have acted shows the position is not ________(suit) for someone like you. That is to say, you have lost the chance.