学龄前期是指（）
A.1～3岁
B.3～7岁
C.5～7岁
D.3～8岁
E.5～9岁
参考答案：B
解析：3周岁后到7周岁为学龄前期。
There is very little _____ in _____ him to study hard. It won't help much. [ ]
A. method; persuading
B. way; persuade
C. means; persuading
D. point; persuading
一周太湖水质变化情况，选择条形统计图比较合适______．
