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【单选题】
可明确骨盆骨折的主要体征是A.
弹性固定
B.
异常活动
C.
双下肢长度不等
D.
局部肿胀、瘀斑
E.
骨盆挤压分离试验阳性
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举一反三
【单选题】Suppose a consumer who purchases only two goods is making a utility - maximizing choice and then the price of one of the goods decreases. What will happen?
A.
The consumer's purchasing power will de crease
B.
The consumer's utility will increase
C.
The consumer's income will increase
D.
The consumer’s income will decrease
【单选题】.—____ when has the country been open to international trade? —1978, I suppose.
A.
Since
B.
In
C.
From
D.
After
【简答题】综述树丛设计的构图法则
【单选题】Suppose there is an increase in consumer confidence. Which of the following represents the complete list of variables that must increase in response to this increase in consumer confidence?
A.
consumption
B.
consumption and investment
C.
consumption, investment and output
D.
consumption and output
E.
consumption, output and the interest rate
【多选题】下列关于磁场强度H和磁感应强度B区别的叙述正确的是
A.
H 是电流产生的磁场, B是试探电流元实际感受到的磁场。
B.
在空间没有磁介质存在时,也就是当磁化强度M为零时,磁感应强度B=H。
C.
磁场强度H和磁感应强度B关系的数学表可写成： B(r)=H(r)+M(r)
D.
H 是外场，B是总场,即磁感应强度B应是电流产生的磁场H和磁介质被磁化产生的磁场M的矢量和。
【单选题】18) Suppose there is an increase in consumer confidence. Which of the following represents the complete list of variables that must increase in response to this increase in consumer confidence?
A.
consumption and output
B.
consumption and investment
C.
consumption, investment and output
D.
consumption, output and the interest rate
E.
consumption
【单选题】对于各向同性均匀介质中的磁感应强度矢量B和磁场强度矢量H之间的关系，以下说法正确的是
A.
顺磁质中 B 与 H 方向相同，抗磁质中 B 与 H 方向相反
B.
不管是顺磁质还是抗磁质， B 与 H 方向总是相同的
C.
介质中 B 与 H 大小比值为介质的相对磁导率，真空中 B 与 H 大小比值为真空的磁导率
D.
以上说法都不正确
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