深冷装置中防止水化物和固体二氧化碳进入膨胀机系统的最后一道防线是（）。
A.入口过滤网
B.入口分离罐
C.干燥床
D.甲醇喷注系统
参考答案：A
补全对话（每小题2分，共10分）
A: Hello小题1:________
B: Hi, John. May I speak to Tim?
A: 小题2:________, please. He is out. Can I take a message?
B:Yes. He told me to meet Lucy at the airport, but I don’t know when she’ll arrive. 小题3:_______
A: OK, I will tell him to call you back when he comes back. 小题4:_______
B: My telephone number is 88924461小题5:_______
A: You are welcome. Bye!
B: Bye!
哲学和科学的共性是（）.
