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问题 单项选择题

为补偿飞机高度对反射信号强度的影响，差频放大器的频率特性是（）。

A.增益随差频的增大而减小

B.增益随差频的增大而增大

C.增益与差频的大小无关

D.增益在整个差频范围内保持不

答案

参考答案：B

选择题

数据1，0，4，3的平均数是（　　）

A．3

B．2.5

C．2

D．1.5
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填空题



I’d like to talk about (1) in England and Wales, and in England and Wales there are (2) of council. For instance, if I could take the example of Oxfordshire, there is (3) where they are responsible for education, (4) , structure planning, highways, (5) , and so on. And there are (6) district councils, again in Oxfordshire, and they are (7) , in particular council housing, for local plans, for (8) , environment health, and they’re also responsible for (9) , and in Oxford, for instance, they are building an ice-rink (10) of the city.
If we could (11) the question of education, I think this would (12) of local government in the (13) . First of all, there is a minister at (14) level. He is the (15) for Education and he’s responsible for running a (16) education system in the (17) . But (18) there is a lot of local control. So the local councils, (19) such as Oxfordshire County Council, actually run the schools and colleges in their (20) .
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