ATP是细胞内流通的能量“通货”。下列关于ATP的说法中，错误的是
①参与ATP形成的元素包括C、H、O、N、P
②在叶绿体中，ATP的运动方向是由叶绿体的囊状结构到叶绿体基质
③洋葱表皮细胞能形成ATP的细胞器有线粒体和叶绿体
④ATP是各种活细胞内普遍存在的一种高能磷酸化合物，是细胞唯一的直接能源物质[ ]
A．①③
B．③④
C．②③
D．②④
答案：B
Bill and Fred were students at a university and they were friends. They didn’t have money, so when it was time their summer vacation, Bill said, “Let’s our vacation in trailer(活动房车), Fred. It is than a hotel. I can borrow my father’s trailer.” Fred was very happy, so they got into the trailer and began their vacation. They wanted early the next day to go fishing, they didn’t have an alarm clock.“ That’s , Bill,” Fred said, “ I have a good way. I’ll put bread on the roof of the trailer tonight and they will wake us up in the morning.” Bill was very , but he didn’t say anything. Fred was right. When it was at the first light, some came down to eat the bread, and their noise on the roof (屋顶) of the trailer woke them up quickly.
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