出口空气罐为什么定期补气?
参考答案:
出口空气罐定期补气可以缓冲脉冲压力,降低噪音,使飞灰在输灰管中均匀稳定流动,保护设备。
795与406减去398的差相乘,积是多少?
It was so a sunny day that I decided to go fishing. I went 1.
out early and sit on the bank of the river. I hoped that I would 2.
have a good harvest. A long time passed. Although I waited 3.
patiently, but there was no luck. When the sun was about to set, 4.
I caught nothing , it made me very disappointed. I walked 5.
home sadly with the fishing pole or the empty basket. I was 6.
sure that my mother would laugh at me. Passed a fish market, 7.
I suddenly had an idea. I bought two big fresh fish and brought 8.
them home. My mother would certainly happy when she saw 9.
the fish and she would encourage me to continue to fishing. 10.