重建层厚测试需要调整图像的窗宽窗位到合适的值，一般窗宽要调到最小。
查看答案
测量的重建层厚值与标称层厚值之差不能大于0.5mm
A. 对
B. 错
定位精度只能借助模体来进行检测。
A. 对
B. 错
Yad Vashem has a (large) ___ of personal stories, photos and items from the Jews who were killed by the Nazis.
A. assembly
B. collection
C. supply
D. gathering
The reports of terror attacks in Paris were ___ across newspapers and websites.
A. shielded
B. splashed
C. scanned
D. stretched
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