下列哪些运动不适合老年人选择
A．游泳
B．慢跑
C．散步
D．百米短跑
E．冷水浴
参考答案：D
If you don't know how to say something in English, you say: _______ [ ]
A. I don't understand
B. I'll start now
C. Excuse me. How do you say that in English?
D. I don't know
对一般心脏病患者要求拔牙时（）
A.不应做拔牙手术
B.绝对禁止拔牙
C.可以拔牙，但麻醉药内不加肾上腺素
D.为了拔牙效果好，拔牙时应加肾上腺素
E.必须在心电监护下拔牙
