什么是发射机互调干扰?

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问题:

什么是发射机互调干扰?

考点:移动通信专业技术移动通信的电波传播移动通信的电波传播题库
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阅读理解。
      Some children wish to be writers some day. They want to write stories or books for people to read.
That's good!It's good to write something for people to read!But they should know that they need to be
good readers first before they are really good writers. They should read a lot of books, instead (代替) of
watching TV and spending a lot of time playing games when they are free.
     There is more fun in reading, you want to look for more books to read.
     Before you decide (决定) to be a good writer, you'd better say to yourself, "I must read more and
more!"
1. This article mainly tells us that ______.
[ ]
A. some children wish to be writers some day
B. it is good to write something for people to read
C. reading can be helpful for us to become a good writer
D. writers like to read more books for fun
2. Some children want to be writers ______.
[ ]
A. because they want to be good readers
B. to write stories or books for people to read
C. to find good work some day
D. to get more money to keep a family
3. It's good for children ______.
[ ]
A. to do a lot of reading
B. to watch TV in the evening
C. to have wishes only
D. to be good writers right now
4. Reading can ______.
[ ]
A. help you to be a good player
B. help you write well
C. make you work better
D. make you watch more TV at home
5. From the passage we know that ______.
[ ]
A. all children like to be writers
B. people like to read for children
C. all writers are children
D. children need to read more and more books
题型:问答题 简答题

下列说法正确的是()。

A.企业的长期供给曲线是平均可变成本曲线以上的边际成本曲线

B.企业的长期供给曲线是平均成本曲线以上的边际成本曲线

C.企业的短期供给曲线比长期供给曲线更有弹性

D.企业的长期供给曲线是价格等于最 * * 均成本时的一条水平线

题型:问答题 简答题

关于化脓性关节炎,下列哪项是不正确的()

A.本病好发于髋,膝关节

B.金黄色葡萄球菌是最常见的致病菌

C.细菌多数是经血液循环进入关节

D.可以并发纤维性或骨性强直

E.本病多见于成人

题型:问答题 简答题

下列关于Oracle体系结构的叙述中,不正确的是

A.表空间是逻辑存储单元,每个表空间只能刨建一个数据文件

B.Oracle数据库的物理存储按数据块、盘区和段来组织

C.Oracle实例由系统全局区和一些进程组成

D.系统全局区是内存中的区域

题型:问答题 简答题

硝酸甘油治疗心绞痛的主要作用机理是:()

A、选择性扩张冠脉,增加心肌供血

B、减慢心率,降低心肌耗氧量

C、改善心肌代谢,增加心肌耐缺氧能力

D、扩张外周血管,降低心脏负荷和心肌耗氧量

E、降低血压,反射性兴奋交感神经改善心肌供血

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