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【判断题】
LTE TDD支持5 ms和10 ms的上下行子帧切换周期。
A.
正确
B.
错误
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【单选题】当螺纹公称直径、牙型角、螺纹线数相同时,细牙螺纹的自锁性能比粗牙螺纹
A.
锁性能(  )。
B.
C.
D.
相同
E.
不一定
【单选题】Clifford Berryman got the teddy bear more popularized by______.
A.
naming it after President Roosevelt
B.
designing a series of teddy bear toys
C.
representing its stories in political cartoons
D.
representing it on greeting cards
【单选题】Spemann 将蝾螈的早期原肠胚的表皮外胚层移植到另外一个早期原肠胚的神经外胚层区域,该移植块将分化成为( )。
A.
表皮
B.
脊索
C.
神经外胚层
D.
体节
【单选题】当螺纹公称直径、牙型角、螺纹线数相同时,粗牙螺纹的自锁性能比细牙螺纹的自锁性能( )。
A.
B.
C.
相同
【单选题】能完成两个1位二进制数相加并考虑到低位来的进位的器件称为(    )。
A.
编码器    
B.
译码器    
C.
全加器    
D.
半加器
【多选题】74LS138是3线-8线译码器的一种,该电路能具有的功能是
A.
将输入的三位二进制代码转换成8位控制位号
B.
将三位控制信号转换成八位二进制代码
C.
将输入的8位控制信号转换成三位二进制代码
D.
当撤去输入信号时,输出信号立即消失
【单选题】It wasn’t long _______ the two daughters of President Obama got used to the life in the White House
A.
that           
B.
before           
C.
until       
D.
and
【多选题】What does the President’s Cabinet do in America?
A.
Advises the President
B.
Suggest the President
C.
meet to make decisions
D.
try a case
【单选题】.He ___ an attempt ___ the President but failed.
B.
took; to murder   B.made; at murdering  
C.
got; to murder   B.had; at murdering
【单选题】听力原文:Woman: The president got what he wanted out of the television industry last week... a pledge to develop the rating system in America based on which the electronic V-chips could automatically bloc...
A.
It will automatically rate the TV shows so as to protect children from sex and violence.
B.
It will block out the offensive parts in a TV show.
C.
It will enrich people's life by offering a variety of TV programs.
D.
It aims to help parents to have a better control on what children should watch on TV.
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