TD-SCDMA中,上、下行是怎样进行切换的?

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问题:

TD-SCDMA中,上、下行是怎样进行切换的?

考点:移动通信技术移动通信技术题库
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注浆工艺内容主要包括()。

A.注浆方法的选择和注浆设备的选择及安装 

B.注浆孔的布置 

C.注浆时间选择 

D.注浆控制技术的确定 

E.注浆施工及效果检查

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如图所示,虚线区域内存在匀强磁场,当一个带正电的粒子(重力不计)沿箭头方向穿过该区域时,运动轨迹如图中的实线所示,则该区域内的磁场方向可能是

A.平行纸面向右

B.平行纸面向下

C.垂直纸面向里

D.垂直纸面向外

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用适当的并列连词填空

1.  He couldn't know the truth about me,_____ he wouldn't treat me like this.

2.  The bell is ringing _____the lesson is over.

3. Although he was ill,_____he kept on working.

4.  I can't make up my mind _____we will go to Shanghai ______we will stay in our city.

5.  He doesn't talk much,_____he thinks a lot.

6.  It must have rained last night _____the ground is still wet.

7. The president will visit the town in May _____he will open the new hospital.

8. Jane was dressed in green _____Mary was dressed in blue.

9.  ______ he did not speak distinctly _____I did not hear it clearly.

10. He is clever,_______,he often makes mistakes.

11.  _____ did we write to her ______we called up her.

12. He hasn't any money ______I'm going to lend him some.

13. The child was sick;he,______,didn't go to school.

14. Mary was neither happy,_______was she sad.

15.  Put on more clothes,______ you'll catch cold.

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2002年诺贝尔物理学奖中的一项,是奖励美国科学家贾科尼和日本科学家小柴晶俊发现了宇宙X射线源.X射线是一种高频电磁波,若X射线在真空中的波长为λ,以h表示普朗克常量,c表示真空的光速,以E和m分别表示X射线每个光子的能量和质量,则(  )

A.E=,m=0

B.E=,m=

C.E=,m=0

D.E=,m=

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2011年3月5日至14日,十一届全国人大四次会议在北京召开,会议审查并批准了[ ]

A.《关于开展国家教育体制改革试点的通知》

B.《国民经济和社会发展第十二个五年规划纲要》

C.《国家中长期人才发展规划纲要(2010—2020年)》

D.《国家中长期教育改革和发展规划纲要(2010—2020)》

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