①人体成熟的红细胞、蛙的红细胞、鸡的红细胞中均能合成ATP
②能进行有氧呼吸的细胞不一定含有线粒体,但一定含有相关的酶,可产生ATP
③ATP中的“A”与构成DNA,RNA中的碱基“A”不是同一物质
④ATP是生物体生命活动的直接供能物质,但在细胞内含量很少.
排序。
A. There are five books on the table.
B. It's small, but it's clean.
C. There is a doll on the bed.
D. Look! This is my room.
E. I like my room.
F. There is a table and a bed in my room.
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设圆 F1:x2+y2+4x=0 的圆心为F1,直线l过点F2(2,0)且不与x轴、y轴垂直,且与圆F1于C,D两点,过F2作F1C的平行线交直线F1D于点E,