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【简答题】
轴心受力的对接焊缝，当正缝连接的强度低于焊件的强度时，为了提高连接的承载能力采取的措施是()。 (A)可增大板件的厚度 (B)可增加焊脚高度 (C)可改用斜缝 (D)可改成搭接焊缝
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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
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【单选题】.—____ when has the country been open to international trade? —1978, I suppose.
A.
Since
B.
In
C.
From
D.
After
查看完整题目与答案
【简答题】综述树丛设计的构图法则
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【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
查看完整题目与答案
【判断题】矢量场H和磁场强度B的关系为 。()
A.
正确
B.
错误
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【多选题】电场强度和电位移矢量,磁场强度和磁感应强度的关系为
A.
E=εD
B.
D=εE
C.
B=μH
D.
H=μB
查看完整题目与答案
【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。
查看完整题目与答案
【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
查看完整题目与答案
【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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【单选题】每24小时尿量在多少毫升范围时属于少尿症:
A.
100-500
B.
500-1000
C.
1000-2000
查看完整题目与答案
相关题目：
【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
查看完整题目与答案
【单选题】.—____ when has the country been open to international trade? —1978, I suppose.
A.
Since
B.
In
C.
From
D.
After
查看完整题目与答案
【简答题】综述树丛设计的构图法则
查看完整题目与答案
【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
查看完整题目与答案
【判断题】矢量场H和磁场强度B的关系为 。()
A.
正确
B.
错误
查看完整题目与答案
【多选题】电场强度和电位移矢量,磁场强度和磁感应强度的关系为
A.
E=εD
B.
D=εE
C.
B=μH
D.
H=μB
查看完整题目与答案
【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。
查看完整题目与答案
【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
查看完整题目与答案
【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
查看完整题目与答案
【单选题】每24小时尿量在多少毫升范围时属于少尿症:
A.
100-500
B.
500-1000
C.
1000-2000
查看完整题目与答案