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【单选题】
How is the glacier on Jade Dragon Snow Mountain related to the life of the local people?
A.
It functions as a frozen reservoir.
B.
It is an amazing view .
C.
It is the symbol of their patron god.
D.
It is regarded as a totem by local people.
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参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】下列有关心脏冠状动脉CTA成像检查要点的叙述,错误的是()
A.
对心脏进行CT扫描成像,最关键的成像指标是单扇区时间分辨率
B.
适当控制被检者的心率有且于减轻或消失冠脉动脉的运动伪影
C.
应选取合适最佳时相进行重建
D.
确定对比剂的最佳扫描延迟时间是冠状动脉造影成功的关键
E.
CT仿真内镜无法进行冠状动脉的腔内重建
【判断题】The motions of hands of in-march Waist-twining Beating are the same as those of Waist-twining Beating.
A.
正确
B.
错误
【单选题】Why do Naxi people celebrate Sanduo Festival?
A.
To commemerate their national hero Sanduo
B.
To attract visitors
C.
To communicate with nature
D.
To worship nature
【单选题】When synchronous generator load is running, when , the space Angle between and is ().
A.
B.
C.
D.
【单选题】What does the meadow Youmuge(游姆阁) cutureally imply?
A.
To show the bravery of Naxi people
B.
To show Naxi's optimism
C.
To show Naxi's pursuit of freedom in love
D.
To show Naxi's marriage tradition
【单选题】For two linear programs MaxZ = CX, AX ≤B, X ≥ 0 and Min W = YB, YA≥C, Y≥ 0 which are dual to each other, there is a relation ( )
A.
Z＞W
B.
Z=W
C.
Z≥W
D.
Z≤W
【单选题】There are three-phase windings with a mutual difference of 120 ° in the generator stator. When the symmetrical three-phase AC current flows, a () will be generated in the stator.
A.
Constant magnetic field
B.
Pulsed magnetic field
C.
A rotating magnetic field
D.
Perpetual magnetic field
【单选题】下列有关冠状动脉CTA检查心电门控技术的叙述,错误的是()
A.
目前CT冠脉动脉成像主要采用前瞻性心电门控技术
B.
回顾性心电门控技术使得按需选择从收缩期至舒张期的各种图像成为可能
C.
回顾性心电门控技术辐射剂量较大
D.
前瞻性心电门控技术在实际扫描中可因不能与实际心率相符而出现伪影
E.
前瞻性心电门控技术可以进行低剂量成像,对心律不齐的患者可进行自适应门控技术
【单选题】The optimality condition of dual simplex method for linear programming is ( )
A.
All test numbers are not positive
B.
all artificial variables are zero
C.
the number of column b is not negative
D.
all the above conditions should be met