一个含有4个组分的相平衡物流独立变量数有()个。
参考答案:6
She was scared ___________ the yard because she was scared _________ by the big dog ___________ at the gate.
A.to go into; to be bitten; lay
B.of going into; to bite; lying
C.of going into; to bite; laying
D.to go into; of being bitten; lying
用Excel可以创建各类图表。为了描述特定时间内,各个项之间的差别情况,对各项进行比较,应该选择()。
A.条形图
B.饼图
C.拆线图
D.散点图