—OK. Let's make for her.
唐代著名的《金刚经》是用什么技术印刷的（ ）
A. Are there any trees in it?
B. Because the air in the park is fresh and it is good for my health.
C. Do you often read books in the park?
D. There is a lake, a bridge and some small hills.
E. No, there aren't any flowers near the lake
Tem: What's in the central park(中央公园)?
Sarah: ____
Tom: ____
Sarah: Yes, there are.
Tom: Are there any flowers beside the lake?
Sarah: Yes, I do.
Tom: Why not in the library?
①当升降机加速上升时，游客是处在失重状态
②当升降机减速下降时，游客是处在超重状态
③当升降机减速上升时，游客是处在失重状态
④当升降机加速下降时，游客是处在超重状态．
下图表示细胞膜的亚显微结构。请根据图回答下面的问题。
