皮皮学，免费搜题
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搜题
【单选题】
，如图为仪表放大器，A3构成的电路为（ ）A.
同相放大电路
B.
反相放大电路
C.
差动放大电路
D.
加法电路
拍照语音搜题，微信中搜索"皮皮学"使用
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皮皮学刷刷变学霸
举一反三
【单选题】This section is to test your ability to give proper answers to questions. There are 5 recorded questions in it. After each question, there is a pause. The questions will be spoken two times. When you ...
A.
I work in a factory.
B.
I read newspaper.
C.
I have bought something for you.
D.
I am very busy now.