Translate the following sentences.Every day, we go to work to work hoping to do two things: share great coffee with our friends and help make the world a little better.
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It has since become our vision: a place for conversation and a sense of community , a third place between work and home.
Match the following the terms with their Chinese equivalents.
超外差式接收机结构的主要特点是具有
A. 高频功率放大器
B. 混频器
C. 调制器
D. 倍频器
单调谐放大器中，并联谐振回路作为负载时，常采用抽头接入，其目的是
A. 展宽频带
B. 提高工作频率
C. 减小矩形系数
D. 减小晶体管及负载对回路的影响
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