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【单选题】
Three-phase transformer connection group is Y, D5, where "5" represents ().
A.
lagging
B.
lagging
C.
leading
D.
leading
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【单选题】How big is the Stone Forest region?
A.
13 square kilometers
B.
78 square kilometers
C.
13 square kilometers
D.
350 square kilometers
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【单选题】完整的颈部扫描范围是()
A.
颞骨岩部上缘至胸骨颈静脉切迹
B.
会厌上缘至C6下缘
C.
C3上缘至C7下缘
D.
额窦上缘至硬腭
E.
头顶至下颌部
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【判断题】Drum belt is about 3-3.5m long and 50cm wide.
A.
正确
B.
错误
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【单选题】The Stone Forest County is an autonomous county of ______.
A.
Bai people
B.
Yi People
C.
Dai People
D.
Naxi People
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【单选题】Transformers with different connection groups cannot operate in parallel because ().
A.
Voltage change rate is too large;
B.
The no-load circulation is too large;
C.
The excitation current at load is too large;
D.
The transformer ratio is different with different connection group numbers.
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【单选题】How famous is the Stone Forest in the world?
A.
It is a natural miracle.
B.
It is a nature reserve.
C.
It is the word natural heritage
D.
It is a geological scenic spot.
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【单选题】When the two transformers run in parallel, the load and short circuit impedance () are distributed.
A.
The magnitude is inversely proportional
B.
The scale is inversely proportional
C.
The scale is proportional to the value
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【单选题】How old is the Stone Forest?
A.
50 million years old
B.
530 million years old
C.
270 million years old
D.
230 million years old
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【判断题】A waist drum consists of drum clapper, drum head, drum ring, drum belt, drumstick and drum silk.
A.
正确
B.
错误
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【判断题】颈胸交界处血管CTA技术对小血管管腔内病变的诊断效能优于DSA检查。 ( )
A.
正确
B.
错误
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