杂气的变化
参考答案：
是指燃吸时杂气的增减情况。分无杂气、微有杂气、略有杂气三个标度。
- I'm hungry. Is there any bread in the fridge?
but we have cakes. Would you like to have one?[ ]
A. Some
B. Much
C. None
D. Nothing
