往纯正的红色中加入白色，红色会（）。
A.明度变高
B.纯度不变
C.明度变低
D.纯度变高
参考答案：A
设a，b，c，d是不同的四个数，已知aA.3B.5C.6D.8
A.3
B.5
C.6
D.8
Smartphone ____ people of different ages that it soon becomes popular in the market. [ ]
A. exposes to
B. links to
C. attends to
D. appeals to
