比较两家医院10年门诊数的增加速度。可选用的统计图为（）。
A.直条图
B.构成图
C.线图
D.散点图
E.统计地图
参考答案：C
根据句意及词首字母提示完成单词。
1. We often b magazines from the school library.
2. If you don't work hard, you'll get bad m in the next English test.
3. Look!A g of students are playing basketball over there.
4. There is an English c in our school. Do you want to join (参加) it?
5. His father s a company last year.
6. If you don't want to go there alone, I'll go t with you.
在二因素完全随机化设计试验结果的方差分析中，误差项自由度为。（）
