题干
The number of people present at the concert was ________ than expected; There are many tickets left
A：much smaller
B：much more
C：much larger
D：many more
答案(点此获取答案解析）
A
CH3CH2OH
CH3CH2OH+HBr
n C6H12O6（葡萄糖）
2C2H5OH+2CO2↑