可编程控制器中，很多智能模块都采用单片机作为其主要部件，完成信号预处理等工作。
参考答案：对
—Do you know the boy _____ is playing soccer there?
—Certainly. He is a friend of my _____.[ ]
A. who; brother's
B. who; brother
C. whom; brother's
D. whose; brother
“唐三彩”的三彩釉陶器，主要釉色为（）
A.黄
B.绿
C.褐
D.红
E.蓝
