题干
Daniel thinks before he works. How he is!
A：careful; carefully
B：carefully; carefully
C：careful; careful
D：carefully; careful
答案(点此获取答案解析）
D
Daniel thinks before he works. How he is!
A：careful; carefully
B：carefully; carefully
C：careful; careful
D：carefully; careful
通气，溶液中有气泡产生；中期可以闻到酒香；后期接种醋酸菌，适当升高温度并通气，酒香逐渐变成醋香。图乙中能表示整个发酵过程培养液pH变化的曲线是