【单选题】Although he is very old, _________ he works very hard.
【单选题】关于心前区震颤的特点,下列哪项是错误的
B.
震颤产生机制与杂音相同,有震颤一定可听到杂音
D.
震颤可分为收缩期震颤、舒张期震颤及连续性震颤
【简答题】A.He is very old now. B.He is in good health. C.He lives in the city now. D.He prefers driving a car.
【单选题】—_______he is very old, he works very hard. — Wow, great. I should learn from him.
【单选题】Mr. Brown is 70 this year. Although he is very old, ____ he works very hard.