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【单选题】
《公民道德建设实施纲要》把()作为社会主义公民道德建设的重点内容，说明了诚信在公民个人的道德品性养成和整个社会公民道德建设中的重要地位和作用。A.
文明礼貌
B.
五讲四美
C.
诚实守信
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举一反三
【简答题】____能结合血红蛋白,并运输到肝脏进行降解,从而为机体有效的保留铁。
【单选题】The passage supports which of the following conclusions?
A.
Clay deposits are only found deep in the Earth.
B.
If clay contains too much iron it will melt when fired.
C.
Only certain types of clay are appropriate for making china teacups.
D.
If sufficient heat is applied, all clay will become nonporous.
【单选题】Which of the following traits does Dee share with her mother? ( )
A.
Neither of them likes the family house.
B.
Both women are strong-willed.
C.
Both of them love the city.
D.
Neither of them went to high school.
【简答题】在RLC串联电路中，外加电压u=100+60cosωt+40cos2ωt V，已知R=30Ω，ωL=40Ω， ，试写出电路中电流i的瞬时值表达式。
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