如图所示，是成熟植物细胞结构模式图，请据图回答
(1)对细胞有保护和支持作用的结构是_____________
(2)水稻苗吸收含硅的无机盐多，而吸收含钙的无机盐少，主要是因为__________________具有控制物质进出的作用；
(3)控制“种瓜得瓜，种豆得豆”现象的物质存在于[ ]____________中；
(4)切洋葱时会闻到一种辣味，该物质存在于[ ]____________中。
(1)细胞壁
(2)细胞膜
(3)②细胞核
(4)⑦液泡
“But I feel good doing this!” the little boy’s voice rang in my ears when I entered the mall. He stood raising for cancer research. In the cold wind, he pulled his hat down over his ears. He warmed one hand in his pocket and held a list with the other hand. I noticed him greeting the people passing by gloves on his hands. I checked my purse but I didn’t find any change. I was ready to give money because I wished cancer could be cured (治愈) one day. “I’ll bring you some money when I returned” I the little boy. “Thank you!” he smiled and he seemed almost in the cold air. I suggested he come inside the mall, but he said, “The guard there said is allowed to raise money for charities (慈善) in the mall. But I feel good doing this here. It’s OK.” I did my shopping and about buying something for him. Finally, I bought a pair of gloves, brown ones. The cashier (收银员) felt curious when I the boy’s words “But I feel good doing this!” The boy still stood where he had been. I offered some money to him and in the list that he handed to me. Then he told me that his best friend George had leukemia (白血病). He did this in order to help him out of . With tears full of my eyes, I put the gloves that I bought for him into his hands. “Will the cancer research give you something to thank you for doing this?” “Oh yes!” the boy said and his eyes up with joy, “They sure do! Now I can stand here much than I expected!” “What do you receive then?” I asked. He answered with a smile, “I get another new, empty list.”
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