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【单选题】
高钾血症常见的临床表现是A.
心动过缓
B.
肠蠕动消失
C.
心电图出现U波
D.
恶心、呕吐
E.
腹胀
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反馈参考答案：
举一反三
【简答题】DNA的变性:双链DNA在变性因素(如过酸、过碱、加热、尿素等)影响下,解链成单链DNA的过程称之为DNA变性。DNA变性后,生物活性丧失,但一级结构没有改变,所以在一定条件下仍可恢复双螺旋结构。
【简答题】A) zones B) areas C) belts D) sphere
【单选题】In each of the 13 trials, how did the magnitude of the electrical force exerted by Sphere X on Sphere Y compare to the magnitude of the electrical force exerted by Sphere Y on Sphere X ?
A.
The magnitude of the electrical force exerted by Sphere X on Sphere Y was greater than the magnitude of the electrical force exerted by Sphere Y on Sphere X.
B.
The magnitude of the electrical force exerted by Sphere X on Sphere Y was less than the magnitude of the electrical force exerted by Sphere Y on Sphere X.
C.
The magnitude of the electrical force exerted by Sphere X on Sphere Y was the same as the magnitude of the electrical force exerted by Sphere Y on Sphere X.
D.
Cannot be determined from the given information
【简答题】一笔单利计算的3年期贷款最终偿付利息是6万元,而市场平均利率为6%,那么本金应为多少?
【单选题】The potential of a uniformly charged sphere is lowest at ( )
A.
infinity.
B.
a distance from the sphere equal to its radius.
C.
a distance from the sphere equal to its diameter.
D.
the suce of the sphere.
E.
the center of the sphere.
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