在体育锻炼中,消耗的能量主要来自于( )
A.脂肪
B.维生素
C.葡萄糖
D.蛋白质
体育锻炼主要把人体内的脂肪代谢产生能量.因此可以有效控制脂肪的量,起到减肥效果.故答案选A.
The teacher noticed him ________basketball on the school playground a moment ago.[ ]
A. played
B. to play
C. playing
D. was playing
酸雨的PH值小于()。
A、4.6
B、5.6
C、6.0