变换气进E61303前的喷淋甲醇的作用？
参考答案：防止粗煤气温度过低，造成粗煤气中的饱和水蒸气变成水，在0度以下结冰冻堵设备和管道。
用所给单词的适当形式完成句子。
1. The audience ______ (clap) loudly for his wonderful performance.
2. The shop ______ (open) at nine o’clock.
3. It was the most ______ (education) experience I have ever had.
4. Receiving letters from their aunt who lives in Scotland gives the family much ______(happy)
5. I was ______ (encourage) to hear you’ll be giving us your support.
起自釉牙本质界向牙表面方向散开，呈草丛状( )
A．釉丛B．釉梭C．釉板D．釉牙本质界E．釉质的生长线
