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【单选题】
X线产生过程中，电子高速运动所需能量主要取决于A.
靶物质原子序数
B.
管电流
C.
管电压
D.
旋转阳极转速
E.
灯丝焦点大小
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】－－－ Look, that gentleman is wearing a beautiful _____ watch. －－－ I don’t think it is real one.
A.
149. --- Look, that gentleman is wearing a beautiful _____ watch. --- I don’t think it is real one. Perhaps it is just a _____ one. A．gold; gold
B.
golden; gold
C.
golden; golden
D.
gold; golden
【单选题】Miss Li is one of in our school. [ ]
A.
a popular teacher
B.
more popular teachers
C.
most popular teachers
D.
the most popular teachers
【简答题】简述汉字构造的音化趋势
【简答题】防止硫酸镁中毒时监测尿量,每24小时应不少于
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