Saturday, September 17, 2022
Monday, November 20, 2023
问题:提高超声检测的空间分辨率的有效途径是增加超声波的()但带来的弊病是探测()的下降。A、波长;频率B、频率;强度C、波长;强度D、频率;深度...
Tuesday, October 24, 2023
问题:根据波数的定义,下面不正确的描述是()。A、与波长成反比B、与频率成正比C、与光子能量成正比D、与波长成正比...
Tuesday, April 16, 2024
Saturday, November 4, 2023
Tuesday, April 16, 2024
Monday, November 20, 2023
Tuesday, October 24, 2023
问题:增感屏—胶片组合体在应用时,胶片的光密度直接取自X射线的能量不足(),其余的光密度都是靠()获得的。...
Monday, July 17, 2023
Tuesday, April 16, 2024
Saturday, August 19, 2023
问题:什么是特殊X射线摄影?试述软X射线摄影、高千伏X射线摄影、体层摄影的基本原理。...
Monday, March 11, 2024
Saturday, September 9, 2023
Saturday, September 17, 2022
问题:降低MRI中被检者所受RF电磁波剂量的核心是什么?...
Saturday, April 6, 2024
Tuesday, October 24, 2023
问题:高速运动的电子与靶物质相互作用时,其能量损失分为()和()....
Monday, January 30, 2023
Monday, November 14, 2022
问题:介质对具有波动性质辐射的吸收一般是随波长的减少而加剧。...
Tuesday, March 26, 2024
Tuesday, October 10, 2023