正常眼动脉的多普勒血流频谱形态是()。
A.高阻力频谱
B.低阻力频谱
C.三相血流频谱
D.三峰双谷血流频谱
E.宽频毛刺样频谱
参考答案:D
解析:眼部血管包括眼动脉、睫状动脉和视网膜中央动脉等的彩色多普勒表现为单一的红色血流(朝向探头)。脉冲多普勒均显示为三峰双谷的动脉血流频谱,和心脏之心动周期一致。
正常眼动脉的多普勒血流频谱形态是()。
A.高阻力频谱
B.低阻力频谱
C.三相血流频谱
D.三峰双谷血流频谱
E.宽频毛刺样频谱
参考答案:D
解析:眼部血管包括眼动脉、睫状动脉和视网膜中央动脉等的彩色多普勒表现为单一的红色血流(朝向探头)。脉冲多普勒均显示为三峰双谷的动脉血流频谱,和心脏之心动周期一致。
阅读理解。 | ||||||||||||||||||||
Prince Henry's Grammar School, Otley
Prince Henry's Grammar School (Specialist Language College), also known as Prince Henry's, is a | ||||||||||||||||||||
1. Prince Henry's Grammar School is a ________ school. | ||||||||||||||||||||
A. boys' B. girls' C. mixed D adults' | ||||||||||||||||||||
2. Which one of the following sentences is NOT true? | ||||||||||||||||||||
A. Prince Henry's Grammar School is always a grammar school. B. Prince Henry's Grammar School is a state comprehensive school now. C. Prince Henry's Grammar School is a secondary school. D. The school teaches boys and girls between the ages of 11 and 18. | ||||||||||||||||||||
3. Why is it still called Prince Henry's Grammar School? Because _______ . | ||||||||||||||||||||
A. the charter has been followed. B. it was Henry Frederick Stuart's son who founded the school. C. Henry Frederick Stuart, Prince of Wales , once retained the name of this school. D. Henry Frederick Stuart 's father was the first headteacher of this school. | ||||||||||||||||||||
4. Which field does the school specialize in? | ||||||||||||||||||||
A. Science B. Physical Education C. Grammar D. Language |