—What's wrong with the baby, doctor?
—_______. Just a slight cold.
A:Something serious
B:Serious something
C:Nothing serious
D:Serious nothing
实验方案中一般只设一个变量因素,每个变量因素应设置对照,下列哪一项不是一组变量的因素( )
—It's so beautiful, I like it very much.