第2题: [单项选择]乳腺照片的可见密度范围依赖于观片灯的亮度及环境条件,亮度一般在 A. 1000~3000cd/m2 B. 2000~4000cd/m2 C. 3000~7000cd/m2 D. 7000~10000cd/m2 E. 4000~8000cd/m2 参考答案:C 答案解析:ACR要求至少有3500cd/m2的亮度水平。
第3题: [单项选择]-- Hello, Alice. You ______very happy. -- Yes. I am happy. My parents am coming to see me tomorrow.
A. get B. look C. turn 参考答案:B 答案解析:[解析] “看上去”用look。