He was unable to make such progress, ____.

将正整数12分解成两个正整数的乘积有1×12，2×6，3×4三种，其中3×4是这三种分解中两数差的绝对值最小的，我们称3×4为12的最佳分解．当p×q（p≤q且pq∈N^*，）是正整数n的最佳分解时，我们定义函数f（n）=q﹣p，例如f（12）=4﹣3=1．数列{f（3ⁿ）}的前100项和为____．

甜美多汁的桃肉、西瓜子、葵花籽分别是由下列哪项发育而来的（　　）

最近，“校园安全”受到全社会的广泛关注，重庆八中对部分学生就校园安全知识的了解程度，采用随机抽样调查的方式，并根据收集到的信息进行统计，绘制了如下两幅尚不完整的统计图，请你根据统计图中所提供的信息解答下列问题：

It's a sunny day in the farm today. My aunt has a farm. The farm is very small. There are twelve horses, sixteen cows and fifty hens. My aunt likes tomatoes very much. So she has many tomatoes in the farm. Look! The tomatoes are red. They are very beautiful.

My aunt likes potatoes very much.