根据百分数的意义，这里是把99粒种子看做单位“1”，
所以发芽率是100%．
故选：C．
根据对话内容选出可填入空白处的最佳答案，有两项为多余选项。
A：Hi, Emma! 66
B：I’m fine, thank you. And you?
A：I’m fine, too. What’s this?
B：67 Please look at it!
A：68
B：Yes, he is.
A：69
B：No, they are my uncle and aunt.
A：Is the girl your sister?
B：70
A：Oh, your family photo is good.
B：Thanks.
营业性舞厅是否允许未成年人进入？
