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【单选题】
下列关于受控源叙述正确的是()
A.
受控源同独立源一样可以单独激励电路
B.
受控电源与独立电源一样是二端(一端口)元件
C.
受控源的控制系数会随控制量的变化而变化
D.
受控电压源流过的电流与外电路相关
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子宫圆韧带
B.
子宫阔韧带
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子宫主韧带
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【判断题】防止子宫脱垂最重要的韧带是主韧带
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B.
错误
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【单选题】We can see a playground____ the two tall buildings. [     ]
A.
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B.
错误
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【单选题】Between the two roads _____ a tall signal tower and many trees.
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B.
当发电机超载时，蓄电池协助发电机供电
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当发动机启动时，给起动机提供大电流
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电源、用电器（负载）双重作用
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【简答题】Quiz A. hole B. uttering C. crack D. quiet E. betrayed F. flattered G. concentrate H.speaking I. wander J. noisy K. although L. affection M. hot N. but O. suggested One summer night, on m...
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【简答题】Between the two tall buildings ___ a monument. A stand B standing C stands D is standing
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【单选题】防止子宫脱垂最主要的韧带是 A. B. C.
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