第4题: [单项选择]The parents have to {{U}}restrain{{/U}} their daughter from running out into the street. A. disallow B. reduce C. prevent D. confine 参考答案:C 答案解析:restrain:阻止。prevent:阻止。I simply can't retrain them from going their own way.我压根无法阻止他们按照自己的方式行事。We've
第5题: [单项选择]高电压胸部摄影特点的叙述,错误的是 A. 诊断细节可见度增加 B. 曝光条件宽容度增大 C. 图像对比度提高 D. 图像层次丰富 E. 需要高栅比的滤线器 参考答案:C 答案解析:图像对比度应该是降低。