海拔每升高100米，气温下降_____℃，等温线密集，气温差别_____。
0.6；大
A boy with two dogs _______ when the earthquake rocked the city.
A．were sleeping
B．is asleep
C．was sleeping
D．are asleep
简述中国石油天然气集团公司“六大禁令”内容？
