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【单选题】
The generator generates electromotive force through rotation. It is a device that can continuously provide current, so it is called ().
A.
The power supply
B.
Electromotive force
C.
Voltage source
D.
Voltage
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【单选题】What makes the Lion Hall a natural music hall?
A.
honeycomb caverns in the ceiling
B.
the roaring of lions
C.
the rushing rivers
D.
the heavy wind
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【多选题】下列有关先心病CTA检查技术的叙述,正确的是()
A.
选择非离子型对比剂浓度为300mg/ml,可避免明显硬化束伪影
B.
儿童监测层面在四心腔层面
C.
儿童多采用手动触发扫描
D.
成人多取CT值达100Hu阈值时,自动触发扫描
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【判断题】In a particular iteration of the simplex method, if there is a tie for which variable should be the leaving basic variable, then the next BF solution must have at least one basic variable equal to zer...
A.
正确
B.
错误
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【单选题】What kind of fish live in the karst caves of Jiuxiang Scenic Region?
A.
carp
B.
blindfish
C.
catfish
D.
goldfish
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【单选题】The synchronous speed of the generator and the magnetic pole logarithm of the generator are ().
A.
Direct proportionality
B.
Inverse proportional relation
C.
Out of proportion
D.
The same
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【单选题】How is the fish here special?
A.
They do not need eyes.
B.
They do not have eyes.
C.
Their eyes have degenerated.
D.
They do not have eye sockets.
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【单选题】If the constraint equation contains a variable whose coefficient sequence vector is the unit vector, then it is unnecessary to introduce ( ) into this constraint equation.
A.
relaxation variable
B.
residual variable
C.
artificial variable
D.
free variable
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【单选题】The EMF frequency of a synchronous generator is 50Hz, the speed is 600r/min, and its polar logarithm is ().
A.
2
B.
5
C.
10
D.
20
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【单选题】下列先心病中有必要行CTA检查的,不包括()
A.
较小的房间隔缺损
B.
右位主动脉弓
C.
动脉导管未闭
D.
法洛四联症
E.
肺静脉畸形引流
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【单选题】Beat 6 of the Waist-twining 360-degree-turn Beating: Lift the right leg, turn right rear by 180 degrees, extend the tiptoe outward by ( ) degrees to form a bow stance.
A.
60
B.
30
C.
45
D.
90
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