如图是某火山在一次喷发后火山灰厚度的分布图,图中a>b>c。读图完成问题。盛行风会影响火山灰的分布状况,据此推测此次喷发时间很可能是当地的
大规模火山喷发所产生的火山灰若在大气层中长期滞留,除会对飞行安全造成威胁外,还包括
— Is he said ____ his car lost? — Yes. He was so foolish ____ leave his car ____.
Whether we’ll hold the sports meet depends on the weather, _____?
I went to bed very late last night, _____, early the next morning.
She took the boy _____ the hand and led him _____ the zero.
We _____ a pleasant journey but for the rain.