【单选题】
Britain faced strong challenges in its global imperial dominance by the beginning of the century.
A. A. 17th
B. B. 18th
C. C. 19th
D. D. 20th
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答案
D
解析
暂无解析
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As a revising chamber, the House of Lords is expected to the House of Commons.
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is the first African-American winner of the Nobel Prize for Literature.
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Of the following writers, is Not a Nobel Prize winner.
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Of the following subjects, are NOT offered to elementary school students.
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About of American crops are for export.
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由电引起的火灾是由于电流的___效应造成的。
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焦耳定律是定量说明传导电流时将___转换为热能的定律。
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任何时刻,在电路中任一闭合回路内各段电压的___等于零。
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分析电路中各部分电流关系时应选用___定律。
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【单选题】
任意时刻流经电路的___的所有电流的代数和恒等于零。
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以支路电流为未知量,依据基尔霍夫定律列方程求解各支路电流的方法叫___。
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应用支路电流法求解复杂电路各支路电流时,若复杂电路有n个节点,则根据基尔霍夫第一定律可列出___个独立节点电流方程。
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【单选题】
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【单选题】
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【单选题】
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【单选题】
当△连接中的3个电阻阻值相等,都等于R△时,等效为Y连接的3个电阻也必然相等,记为RY,且R△=___RY 。
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【单选题】
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AB002 描述磁场中各点磁场强弱和方向的物理量是___。
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【单选题】
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