哪一种统计图纵坐标必须从0开始（）
A.直条图
B.线图
C.半对数线图
D.百分构成图
E.散点图
参考答案：A
I soon found that the work I was doing had al- ready been done by someone else. ____, I was wasting my time.[ ]
A. In other words
B. In a word
C. In words
D. At a word
白天库内温度一般会（）夜晚。
A.等于
B.低于
C.高于
D.无法判断
