核黄素良好的食物来源是（）
A.水果
B.粮谷类
C.植物油
D.动物内脏
E.肉类
参考答案：D
Which phrase is used to describe the volume of air inspired and expired with a normal breath（）
A. Total lung capacity.
B. Forced vital capacity.
C. Tidal volume.
D. Residual volume.
