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【单选题】
对运输时间要求比较高的货物，如海鲜、活动物等适用于那种运输方式是？A.
铁路运输 输
B.
公路运输
C.
航空运输
D.
海洋运输
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
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【单选题】特性阻抗为Z 0 的无耗传输线终端接负载Z L ，若Z L 为容性负载，则传输线上距离负载最近处为______点。
A.
电压波腹
B.
电压波节
C.
电流波节
D.
各种可能的波节波腹
【简答题】如图所示无耗传输线，证明：当Z g =Z 0 时，不管负载多大，传输线有多长，恒有|U i1 |=|U i2 |=|E|/2成立，并且负载吸收功率P L =P i (1-|Г L | 2 )， 为入射波功率。
【简答题】Old people are always saying that the young are not what they were. The young are better educated. They have a lot more money to spend and enjoy more . They grow up more quickly and are not so ...
【简答题】Old people are always saying that the young people are not【61】they were. The same comment is【62】from generation to generation and it is always【63】. It has never been truer than it is today. The young ...
【简答题】若长为l的无耗均匀传输线的特性阻抗为Z 0 ，负载为Z L ：求
【简答题】有一特性阻抗Z 0 =50Ω的微带线，终端接匹配负载，另一端通过1/4波长阻抗变换器与一阻抗为6.4Ω的器件相连接，已知工作波长λ=10cm，微带基片厚度h=0.8mm，基片介质的相对介电常数ε r =9，试计算构成变换器的微带的宽度W及长度l。
【简答题】Old people are always saying that the young people are not 【C1】______ they were. The same comment is 【C2】______ from generation to generation and it is always 【C3】______ . It has never been truer than...
【简答题】下图为一均匀无耗传输线电路，已知Z 0 =100Ω，负载Z L1 =50Ω，Z 12 =30+j10Ω，工作波长λ=3m，源E g =20V，Z g =Z 0 =100Ω求
【简答题】Passage Two Old people are always saying that the young are not what they were. The same comment is made from generation to generation and it is always true. It has never been truer than it is today. ...
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