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【单选题】
The synthetic fundamental magneto motive force generated by the AC three-phase winding is a function of both time and space, which refers to ().
A.
The current is A function of time and the MAGNETOmotive force is A function of space;
B.
The magnetomotive force is a function of time and the current is a function of space;
C.
The magnetic force is distributed cosine in space and rotates with time;
D.
The amplitude of the magnetomotive force is pulsating with time, and the magnetomotive force is distributed cosine in space.
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【多选题】下列有关先心病CTA检查上腔静脉伪影的叙述,正确的是()
A.
如果上腔静脉内对比度浓度过大,则产生的线束硬化伪影明显
B.
若线束硬化伪影明显,则不利于周围结构及病变的显示
C.
先注射一定剂量的对比剂、再注射生理盐水的方法,上腔静脉硬化束伪影较大
D.
采用对比剂与生理盐水同时注射,可以有效降低上腔静脉内伪影
【单选题】How does the Lion Hall get the name?
A.
A lion sculpture is here.
B.
A stalagmite here looks like a lion.
C.
Lions used to live here.
D.
The entire hall looks like a lion.
【单选题】The properties of synthetic fundamental magneto motive force produced by three-phase AC winding are ()
A.
The magnetomotive force is a sine wave along the circumference of the air gap.
B.
The amplitude of the magnetomotive force sine wave is constant;
C.
The magnetomotive force sine wave rotates at a synchronous speed
D.
All of the above.
【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
【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
【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
相关题目：
【多选题】下列有关先心病CTA检查上腔静脉伪影的叙述,正确的是()
A.
如果上腔静脉内对比度浓度过大,则产生的线束硬化伪影明显
B.
若线束硬化伪影明显,则不利于周围结构及病变的显示
C.
先注射一定剂量的对比剂、再注射生理盐水的方法,上腔静脉硬化束伪影较大
D.
采用对比剂与生理盐水同时注射,可以有效降低上腔静脉内伪影
【单选题】How does the Lion Hall get the name?
A.
A lion sculpture is here.
B.
A stalagmite here looks like a lion.
C.
Lions used to live here.
D.
The entire hall looks like a lion.
【单选题】The properties of synthetic fundamental magneto motive force produced by three-phase AC winding are ()
A.
The magnetomotive force is a sine wave along the circumference of the air gap.
B.
The amplitude of the magnetomotive force sine wave is constant;
C.
The magnetomotive force sine wave rotates at a synchronous speed
D.
All of the above.
【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
【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
【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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