评价口腔健康教育效果,最宜采用() A.历史常规资料分析 B.病例对照研究 C.群组

题型:单项选择题 B1型题

问题:

评价口腔健康教育效果,最宜采用()

A.历史常规资料分析

B.病例对照研究

C.群组研究

D.流行病学实验研究

E.横断面调查

考点:口腔执业医师口腔预防医学(综合练习)口腔预防医学(综合练习)题库
题型:单项选择题 B1型题

Jack was ten years old, and his brother, Jimmy, was five. One day, after 小题1:(play) for an hour, they were hungry. Their mom took Jack into the kitchen. She gave him two apples and said to him: “Now give one of 小题2:(they) to your brother. But remember to do it like a gentleman.”

“Like a gentleman?” Jack asked. “How do gentlemen do it?”

“They always give the 小题3:(big) one to the other person,” answered his mom at once.

“Oh,” said Jack. He thought about this for a few 小题4:(second). Then he took these apples to his brother and said to him: “ 小题5:(pick) up one, Jimmy. And remember to do it like a gentleman.

题型:单项选择题 B1型题

如图所示,在光滑水平面上,一个斜面体被两个固定在地面上的小桩ab挡住,然后在斜面上放一物体P,下列说法正确的是

A.若物体加速下滑,则b受挤压

B.若物体减速下滑,则b受挤压

C.若物体匀速下滑,则a受挤压

D.若物体静止在斜面上,则a受挤压

题型:单项选择题 B1型题

在双缝干涉实验中,下列说法正确的是

A.毛玻璃屏上的干涉条纹与双缝垂直

B.把绿色滤光片换成红色,相邻两亮条纹中心的距离将增大

C.若将毛玻璃屏向远离双缝的方向移动,相邻两亮条纹中心的距离将减小

D.若换用间距较小的双缝,相邻两亮条纹中心的距离将增大

题型:单项选择题 B1型题

强迫油循环风冷变压器须装设()。

题型:单项选择题 B1型题

简述煤污病类病原及其特点。

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