厌氧发酵
参考答案:
厌氧发酵是废物在厌氧条件下通过微生物的代谢活动而被稳定化,同时伴有甲烷和CO2产生。
The ___ on the blackboard reads: Everyone should be present at the meeting.
A.record
B.word
C.notice
D.warning
Word的缺省汉字字体为“黑体”,缺省英文字体为“Time New Roman”。( )