为了加快系统的响应速度，需立即读取物理输入点的值，进行逻辑与运算，可使用（）指令。
A.LDI
B.LDN
C.AI
D.OI
参考答案：C
黏度是沥青材料最重要的技术性质之一。
Everyone knows that a desk is made _____ wood and paper is made _____ wood, too. [ ]
A. of; of
B. from; of
C. from; from
D. of; from
