荒煤气中所含的焦油蒸汽在初冷器中绝大部分被冷凝下来，并凝结成较大的液滴从煤气中分离中来。
参考答案：对
Most Chinese children like to sleep with their mother, because they are ______ the dark. [ ]
A. interested in
B. afraid
C. terrified of
D. sure of
在生理状态下呼吸中枢的兴奋性依赖于（）
A.血浆H+浓度
B.低浓度的CO2
C.高O2浓度
D.正常的CO2浓度
E.迷走神经的传入冲动
