下列关于固定阳极X 线管，叙述错误的是
更新时间:2024-11-15 22:32:34 A、集射罩对电子束进行聚焦C
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ThelargestandsmalleststatesoftheUnitedStatesare________.
ThefunctionsofinstitutionsofhighereducationintheU.S.are________.
Howmanypartsdoesascienceandtechnologypaperconsistof?Whatarethey?
Duringthe1990smanyAustralianscalledfortheirnationtobecomearepublicwith________.
Insummer,shewouldsitinthegardenenjoyingthefreshairandthesmellofthethingsshe______.
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