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【单选题】
已知接成Y形的三个电阻都是30Ω，则等效Δ形的三个电阻阻值为（ ）
A.
90Ω
B.
两个 30Ω 一个 90 Ω
C.
30Ω
D.
两个 90Ω 一个 30 Ω
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A.
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B.
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C.
C5-OH
D.
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C.
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【单选题】What can be inferred about the student?
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B.
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C.
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D.
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【单选题】How did the student feel when he saw Socrates waiting patiently on the beach?
A.
Angry.
B.
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C.
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D.
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【单选题】在黄酮化合物的醇溶液中,加人二氯氧锆甲醇液呈鲜黄色,再加人枸橼酸甲醇液,黄色不褪 表示该化合物具有
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【单选题】What can be inferred about the student?
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B.
He is concerned that the professor has misspoken.
C.
He is curious as to why the professor mentioned this information.
D.
He is amazed at the figure presented by the professor.
查看完整题目与答案
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A.
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B.
Puzzled.
C.
Wild.
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