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【单选题】
可以实现稳压并进行两种电源的转换的是( )A.
中站调压屏
B.
中站交直流屏
C.
25HZ轨道电源屏
D.
UPS
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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】Which is not the g rowth habit of tea trees in i nfancy period?
A.
It has a strong nutritional growth and an absolute advantage.
B.
Branching mode of branches: uniaxial branching.
C.
Root system: straight root system is dominant, lateral root is few; cuttage is fibrous root.
D.
The shape and size of the tea fruit are related to the number of seeds in the tea fruit.
【简答题】All the wit and learning in the economic circle will be present at the seminar.
【单选题】The first decade in the 21st century _______ the rapid rise of China as a world economic power.
A.
witness
B.
has witnessed
C.
will witness
D.
have witnessed
【多选题】载流导体周围的铁磁物质在交变磁场反复磁化作用下，将产生（ ）和（ ），把从电源吸收的能量转化为热能，使铁芯发热。
A.
电阻损耗
B.
电导损耗
C.
磁滞损耗
D.
附加损耗
E.
涡流损耗
【单选题】The characteristics of information are ______ those of other economic resources.
A.
same with
B.
different from
C.
contrary to
D.
opposite to
【简答题】载流导体周围的铁磁物质在交变磁场反复磁化作用下，将产生（ ）和（ ），把从电源吸收的能量转化为热能，使铁芯发热。
【判断题】Economic g rowth with a n increased willingness to engage in international trade will always improve the economic well-being of a large country.
A.
正确
B.
错误
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