问题
单项选择题
高分辨率CT扫描的特点是（）。
A.空间分辨率相对较高
B.密度分辨率相对较高
C.图像噪声相对较低
D.图像显示相对较为柔和
E.黑白更为分明
答案
参考答案：A
解析：
高分辨率CT扫描通常采用较薄的扫描层厚（1～2mm），和高分辨率图像重建算法，结果得到高分辨率的扫描图像。
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高分辨率CT扫描的特点是（）。
A.空间分辨率相对较高
B.密度分辨率相对较高
C.图像噪声相对较低
D.图像显示相对较为柔和
E.黑白更为分明
参考答案：A
解析：
高分辨率CT扫描通常采用较薄的扫描层厚（1～2mm），和高分辨率图像重建算法，结果得到高分辨率的扫描图像。
Have you ever tried to draw a straight line, only to find it turns out all wrong? Or, have you ever wanted to show ___36___ at a party and found the song you’d practiced so many times suddenly__37_ more difficult? I’ve had both these__38___. As a senior student, I have to ___39__ many exams. Each time, I think, “ I__40___ fail this time,’’ but I get a low mark. Don’t be surprised---it’s not __41___ I don’t try, do enough preparation, __42__ take it seriously. On the contrary, it is because I give it too _43__ attention. The thought “ I must pass” makes me taste the terrible flavor of failure. I often___44___ to my friends, “ Don’t be too hard ___45____ yourself.” However, when I __46___ my own goals, I do not listen to my own advice. So why not ___47__ this crazy thought of achieving the best? Just face the problem__48____before you with a calm mind, work and you will succeed. In my opinion, __49___ a calm state of mind is a skill for life. People__50__ want to succeed realizing this is of __51______ importance. So __52___ time you’re trying to draw a straight line or ___53___ a performance, tell yourself, “ If I can just do it _54___ than last time, it’s a success.” Keep a calm state of mind, and you will be happy __55____you succeed or fail.
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