问题
单项选择题
无线通信系统接收设备中的中放部分采用的是以下哪种电路（）.
A.调谐放大器
B.谐振功率放大器
C.检波器
D.鉴频器
答案
参考答案：A
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无线通信系统接收设备中的中放部分采用的是以下哪种电路（）.
A.调谐放大器
B.谐振功率放大器
C.检波器
D.鉴频器
参考答案：A
阅读下面短文，从短文后所给各题的四个选项A.B.C.D中，选出可以填入空白处的最佳选项。 In the clinic, I asked if Michael could be retested, so the specialist tested him again. To my 21 , it was the same score. Later that evening, I _22 _ told Frank what I had learned that day. After talking it over, we agree that we knew our _23_ much better than an IQ test. We 24 that Michael’s score must have been a _25 and we should treat him __26___ as usual. We moved to Indiana in 1962, and Michael studied at Concordia High School in the same year. He got 27 grades in the school, especially 28 biology and chemistry, which was a great comfort. Michael _29_ Indiana University in 1965 as a pre-medical student, soon afterwards, his teachers permitted him to take more courses than _30_ . In 1968, he was accepted by the School of Medicine, Yale University. On graduation day in 1972, Frank and I 31 the ceremony at Yale. After the ceremony, we told Michael about the _ 32_ IQ score he got when he was six. Since that day, Michael sometimes would look at us and say _33 , “My dear mom and dad never told me that I couldn’t be a doctor, not until after I graduated from medical school!” It is his special way of thanking us for the _34 _ we had in him. Interestingly, Michael then _35 _ another IQ test. We went to the same clinic where he had _36 _ the test eighteen years before. This time Michael scored 126, an increase of 36 points. A result like that was supposed to be _37 _ . Children often do as _38 _ as what adults, particularly parents and teachers, _39_ of them. That is, tell a child he is “ _40_”, and he may play the role of a foolish child.
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