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【单选题】
When a 50Hz transformer is connected to a 60Hz power grid, the size of the external voltage remains unchanged, and the excitation current will be ().
A.
increase
B.
reduce
C.
The same
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参考答案：
举一反三
【单选题】When the transformer is connected to the rated voltage at the primary side and the pure resistive load at the secondary side, the power input from the primary side ().
A.
Contains only active power;
B.
Contains only inductive reactive power;
C.
It contains both active power and inductive reactive power;
D.
It contains both active power and capacitive reactive power.
【多选题】Which ones were the well-known cultures in ancient Yunnan?
A.
ethnic culture
B.
bronze culture in the ancient Dian Kingdom
C.
Cuan culture in Qujing
D.
Nanzhao culture in Dali
【单选题】Transformer load ( ) increases, theoretically speaking, its main flux ().
A.
Slightly increased;
B.
Slightly decreased;
C.
Much larger;
D.
It's a lot smaller.
;
;
;
。【单选题】What culture dominated northeast Yunnan in Jin Dynasty?
A.
Ethnic Culture
B.
Cuan Culture
C.
Nanzhao Culture
D.
Bronze Culture
【单选题】When the secondary current of the transformer increases, the primary current ().
A.
Reduce;
B.
The same;
C.
Increase accordingly;
D.
Not necessarily.
【多选题】下列关于口腔颌面部相关疾病CT检查要点的叙述,正确的是()
A.
考虑恶性肿瘤时,增强扫描应加大扫描范围
B.
对于颌面软组织病变CT扫描应适当增加曝光条件,以保证足够的密度分辨率
C.
观察舌体、软腭、会厌、口咽后壁等结构时,以正中矢状面重组成像为主
D.
颌面部外伤时,扫描要求采集层厚尽可能薄,重建间距窄及采用高分辨卷积核
相关题目：
【单选题】When the transformer is connected to the rated voltage at the primary side and the pure resistive load at the secondary side, the power input from the primary side ().
A.
Contains only active power;
B.
Contains only inductive reactive power;
C.
It contains both active power and inductive reactive power;
D.
It contains both active power and capacitive reactive power.
【多选题】Which ones were the well-known cultures in ancient Yunnan?
A.
ethnic culture
B.
bronze culture in the ancient Dian Kingdom
C.
Cuan culture in Qujing
D.
Nanzhao culture in Dali
【单选题】Transformer load ( ) increases, theoretically speaking, its main flux ().
A.
Slightly increased;
B.
Slightly decreased;
C.
Much larger;
D.
It's a lot smaller.
【单选题】What culture dominated northeast Yunnan in Jin Dynasty?
A.
Ethnic Culture
B.
Cuan Culture
C.
Nanzhao Culture
D.
Bronze Culture
【单选题】When the secondary current of the transformer increases, the primary current ().
A.
Reduce;
B.
The same;
C.
Increase accordingly;
D.
Not necessarily.
【多选题】下列关于口腔颌面部相关疾病CT检查要点的叙述,正确的是()
A.
考虑恶性肿瘤时,增强扫描应加大扫描范围
B.
对于颌面软组织病变CT扫描应适当增加曝光条件,以保证足够的密度分辨率
C.
观察舌体、软腭、会厌、口咽后壁等结构时,以正中矢状面重组成像为主
D.
颌面部外伤时,扫描要求采集层厚尽可能薄,重建间距窄及采用高分辨卷积核
参考解析：
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