文丘里洗涤器堵塞的现象、原因、以及处理方法？
参考答案：现象：
（1）文丘里压差显示增大；
（2）进入灰水阻力大，流量减小；
（3）洗涤后微尘含量超标。
原因：
（1）合成气带灰严重；
（2）灰水悬浮物含量过高，结垢。
处理方法：
（1）加大文丘里喷淋水量；
（2）提高激冷水量和激冷室液位，降低合成气带灰量；
（3）做好絮凝剂的配制和添加工作，降低灰水含固量。
Complete the following passage by using the words in the box. Each word can only be used once. Note that there is one word more than you need.
I figured that I had failed physics because I had no interest in the subject. But now I changed my attitude. I said to myself, “If the college _____小题4:_____ demand that I pass my physics examination before I obtain a degree, who am I to question their wisdom?” So I ______小题5:____ for physics again. This time I passed because instead of wasting my time in worrying about how hard it was, I studied _____小题6:_____. I solved my ____小题7:_____ worries by taking on some additional jobs, such as selling punch at the college dances, and by borrowing money from my father, which I paid back soon after ____小题8:______. As I look back at it now, I can see that my problem was one of _____小题9:_____, a lack of willingness to find the causes of my worry and face them realistically. |