在食物的热效应中,耗能最高的是()。
A.糖类
B.脂肪
C.蛋白质
D.脂肪和蛋白质的混合
参考答案:C
--- Would you mind my opening the window?
---
A.I would
B.I’m afraid it’s too windy
C.Yes, please go ahead.
D.Sure. I’m going to close it soon.
软X线摄影的管电压范围为()
A.25kV
B.25~40kV
C.40~100kV
D.40~60kV
E.100~200kV