问题
问答题 简答题
怎样判断发酵料液的酸碱度？
答案
参考答案：
判断发酵料液酸碱度，常用pH试纸测试，沼气细菌适宜在中性或微碱性的环境条件下生长繁殖。中性发酵料液的pH（酸碱度）以6.5～7.5为佳，pH小于5.0是过酸，pH大于8.0是过碱；此外也可根据沼气燃烧时火苗的颜色来判断，如火苗发黄、发红或者有酸味，说明过酸。料液过酸或过碱都要进行调节。
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怎样判断发酵料液的酸碱度？
参考答案：
判断发酵料液酸碱度，常用pH试纸测试，沼气细菌适宜在中性或微碱性的环境条件下生长繁殖。中性发酵料液的pH（酸碱度）以6.5～7.5为佳，pH小于5.0是过酸，pH大于8.0是过碱；此外也可根据沼气燃烧时火苗的颜色来判断，如火苗发黄、发红或者有酸味，说明过酸。料液过酸或过碱都要进行调节。
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| My family moved into our home nine years ago and we spent a lot of time and energy in the yard to get it looking like it does today. We live on a corner and the yard is 1 by a rock wall. We call this area our "rock garden". Last summer, I found a tiny little 2 in the yard that I could not immediately identify. I knew I didn't plant it. We 3 to let it continue growing until we could 4 what it was. Weeks passed and as I made my way back to the 5 plant, it appeared to be a sunflower. I decided to treat it with care and 6 the weeds around it. As I pulled rocks from the area to get to the weeds, I noticed something 7 . The sunflowers had not 8 where I saw the stalk (茎) began. It 9 had begun under a big rock and grown under and around it to reach the 10 . That's when I 11 that if a tiny little sunflower didn't let a big rock stand in its 12 of developing, we too have the capability of doing the same thing. 13 our environment begins to see that we believe in ourselves like that little sunflower, we can 14 the same nutrient as well. 15 , we need to believe in ourselves knowing we have the capabilities in 16 our desires. Like the sunflower, it knew it had the capability to overcome its obstacle because it 17 in the universal truth and had 18 that it would succeed. Stand tall like the sunflower and be 19 of who and what you are and the environment will begin to support you. You will find a way to go under or 20 your big obstacle in order to reach your desires. | |||
| ( )1. A. surrounded ( )2. A. seed ( )3. A. wished ( )4. A. watch out ( )5. A. weak ( )6. A. removed ( )7. A. wonderful ( )8. A. passed ( )9. A. aimlessly ( )10. A. air ( )11. A. realized ( )12. A. place ( )13. A. Although ( )14. A. seek ( )15. A. First ( )16. A. setting ( )17. A. lay ( )18. A. faith ( )19. A. proud ( )20. A. beneath | B. covered B. animal B. decided B. work out B. mysterious B. refused B. secret B. started B. naturally B. top B. doubted B. way B. Since B. dig B. Generally B. controlling B. trusted B. energy B. fond B. over | C. blocked C. plant C. preferred C. give out C. lonely C. reformed C. valuable C. stopped C. especially C. sun C. expected C. course C. Unless C. gain C. Finally C. achieving C. grew C. hope C. careful C. above | D. cut D. rock D. refused D. figure out D. remarkable D. regained D. unusual D. broken D. actually D. wall D. noticed D. process D. Once D. attract D. Eventually D. directing D. rooted D. courage D. aware D. around |