下图所示中能反映DNA析出量多少与NaCl溶液浓度之间关系的是（）
A.图A
B.图B
C.图C
D.图D
参考答案：C
Mum, my teacher, Mr Wang.
A．he is
B．it is
C．that is
D．this is
The little girl is very young _____she can take care of herself well.
A．so
B．but
C．or
D．if
