常用的测度变量之间相关关系的直观方法有()。
A.直方图法
B.散点图法
C.折线图法
D.饼状图法
参考答案:B
If you are an energetic person with p views as to the right way of doing things, you find yourself________ under pressures.
A.variably
B.invariably
C.invaluably
D.invalidly
甲种50M带宽的宽带单产品包年的价格是多少()
A.600
B.720
C.840
D.1200