下列用来表示测量结果正确反映所欲测量的特点和功能的程度的是() A.信度 B.效度

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问题:

下列用来表示测量结果正确反映所欲测量的特点和功能的程度的是()

A.信度

B.效度

C.区分度

D.难度

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一个300 g的垒球,以20 m/s的速度飞来,运动员以棒击之,球以30 m/s的速度反方向飞回.设击球时间为0.02 s,求棒对球的平均作用力.

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关于下列图片的说法正确的是 (  )

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三. 句型转换 ( 10分)

1. If we want to lose weight, we must go on a diet.

We must have a _________________ _____________ to keep healthy. 

2. The blind man made a living by begging on the roadside.

The blind man ___________ ________ _________ by begging on the roadside.

3. You have become fatter than before; I think you should lose weight. 

You have _________ ________ _____________; I think you’d better lose weight.

4. Eating more vegetables will benefit you a lot.

Eating more vegetables will ___________ ___________ ___________ to you.  

5. Having watched TV for too long, I felt it boring.

Having watched TV for too long, I __________ ____________ ________ it.

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中枢神经系统感染出现颅内压升高时最重要的治疗措施是()

A.应用呼吸中枢兴奋剂

B.补充白蛋白

C.快速静滴20%甘露醇

D.应用肾上腺皮质激素

E.亚冬眠疗法

题型:单项选择题

绘图题:请画出经过PT测量A相电压的表计回路接线图。

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