并联比较型A/D转换电路由 、寄存器和代码转换器三部分组成。
A. 电流转换器
B. 双积分电路
C. V-F变换电路
D. 电压比较器
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用74LS161设计一同步12进制计数器,采用同步置零的方法, 应该在 状态置零
A. 1100
B. 1101
C. 1011
D. 1010
check the following words and expressions and try to match them with their Chinese equivalents.
primary buying motives cause a customer to select one type, kind, or class of merchandise or service rather than another.
A. items
B. things
C. commodities
D. articles