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【简答题】
已知 a+ 1 a =2 ， a 2 + 1 a 2 =2 ， a 3 + 1 a 3 =2 ，则 a 4 + 1 a 4 =______．
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【单选题】Why didn't Juli's father spend money fixing their yard?
A.
Because he had not time.
B.
Because he had paid much money for the Medical Treatment for his brother.
C.
---
D.
...
【单选题】关于感生电动势的描述中,下列说法正确的是 :
A.
产生感生电动势的非静电力是洛伦兹力
B.
感动生电动势只能出现在导体中
C.
涡旋电场本质上与静电场相同
D.
普遍形式的电磁感应定律表明变化的磁场可以激发磁场
【单选题】Why didn't the closest ships come to the Titanic's rescue?
A.
They didn't hear the call.
B.
They didn't think it is serious.
C.
They met iceberg too.
D.
They were not fast enough.
【单选题】关于感生电动势的描述中,下列说法正确的是: A 产生感生电动势的非静电力是洛伦兹力; B 感动生电动势只能出现在导体中; C 涡旋电场本质上与静电场相同; D 普遍形式的电磁感应定律表明变化的磁场可以激发电场。
A.
A
B.
B
C.
C
D.
D
【简答题】以PPT的形式全面完整介绍一种新型的遥感平台,如**卫星(应包括最基本的发射时间、轨道参数、传感器名称及波谱范围、数据特点、主要应用领域等)。
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