防止和解除水合物堵塞的方法有哪些?
参考答案:
防止和解除水合物堵塞的方法有:提高节流前天然气温度、加注防冻剂、干燥气体、降压等方法可防止和解除水合物堵塞。
—I heard that more than 300 people died from the cold weather in England this winter.
—Yes, news came as shock to us.[ ]
A. a; a
B. the; /
C. /; a
D. the; a
结膜下药物注射