关于多普勒超声的描述，下列哪一项是错误的 A．主要分为连续波_爱下问搜题

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问题单项选择题

关于多普勒超声的描述，下列哪一项是错误的

A．主要分为连续波和脉冲波多普勒
B．脉冲波多普勒具有距离选通性
C．连续波多普勒不具有距离选通性
D．脉冲多普勒，脉冲重复频率越高，可测量血流速度越高
E．显示多普勒频谱可直接测出血流量

答案

参考答案：E

解析：多普勒频谱只能了解血流性质，时相，速度，方向，不能直接测出血流量。

阅读理解

请阅读下列的相关信息，并按照要求匹配信息。请在答题卡上将对应题号的相应选项字母涂黑。
以下是6条有关颜色偏好和性格关系的描述。
A

People who choose GOLD as their primary color like to fit in or belong. They tend to be reliable people who enjoy serving others. Things like tradition and home are very important to them. They need order and structure. They don’t like waste or change.

B

People who choose ORANGE as their primary color need variety and freedom. They take pride in being highly skilled. They enjoy “hands-on” work and often are good in a crisis. They are risk-takers and challenge-seekers.

C

People who choose YELLOW as their primary color are curious about everything. They are confident and knowledgeable. They love sports very much and they work highly efficiently.

D

People who choose GREEN as their primary color are competent and want to control the realities of life. They are analytical and enjoy solving problems and developing systems. They love intelligence and logic. They are often critical of themselves and others.

E

People who choose BLUE as their primary color enjoy close relationships, harmony and integrity(正直). They are often very creative and they also enjoy the creative work of others.

F

People who choose RED as their primary color are always full of vigor and tend to be confident. It seems that they are ready to do anything and will be successful. They also have a strong desire for power.

现在阅读以下根据员工性格提出的促进工作效率的方法，然后从以上A, B, C, D, E和F中找出与它们适合的群体。
小题1:Create a warm and personal working atmosphere; establish a peaceful working environment and try to avoid conflict(冲突); allow them freedom to express their feelings; Praise them for their creativity.
小题2:Assign them work needing detailed planning; define the tasks in clear terms; provide a stable work environment and avoid sudden change; issue rules and regulations; provide good examples.
小题3:Assign them work which needs analytical thinking and problem-solving skills; encourage them to think independently and take their ideas to the next step.
小题4:Assign them work which is action-packed; provide opportunities which need skills and challenges; do not let them do the same job for a long time.
小题5:Assign them work which needs full energy; provide competitive opportunities; let them know that they will be promoted if they do brilliantly.

问答题

简述美国的儿童中心课程编制方式。