A. The tensity of pain that one can endure. B. The test of the tensity of pain. C. The amount of endorphin release. D. The dose of pain to keep one conscious. 参考答案:A 答案解析:threshold是“门槛”的意思,pain thresholds在这里是一种形象的说法,指一个人能够忍受的最强的疼痛感,可以从上下文推断出来。
A. To have a car waiting at the arrival airport. B. To rent a car that can be driven fast. C. To have a car tour. D. To visit many places in a short time. 参考答案:A 答案解析:细节题。对话中问到:Fly-drive?这时要注意听下文(you can arrange for a car to be waiting for you at the airport when you
第12题: [多项选择]关于PET的描述正确的是()。 A. 比SPECT分辨率高,灵敏度低 B. 常用的发射正电子的核素为人体生命元素 C. 能反映人体的生理、生化代谢水平 D. PET/CT实现了衰减校正及同机图像融合,可同时获得功能与解剖信息 E. 小动物PET主要用于动物疾病的早期诊断 参考答案:B, C, D