题干

化学与生活密切相关。下列说法错误的是(  )

A:油脂是产生能量最高的营养物质

B:为使水果尽快成熟,需要用浸泡过高锰酸钾溶液的硅土吸收水果产生的乙烯

C:减少化石燃料燃烧和汽车尾气排放,是减少雾霾发生的有效措施

D:CO2合成可降解的聚碳酸酯类塑料,实现“碳循环”,可有效减少“白色污染”

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答案(点此获取答案解析)

B

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    I go grocery shopping nearly every day. That day I was trying desperately to find a good tomato. I finally grabbed the best one I could find. Backing away from the counter with it in hand. I wasn't paying attention. “Oh, I'm so sorry!” I said as I nearly fell over a woman in an electric cart. Many stores have started providing electric cars for those who have difficulty getting around. “Oh, that's okay. I'm used to it. they need to put horns(喇叭)on these things,” she said with a smile. “We are positioned a bit lower and somewhat out of view. They are also so quiet that often people just don't hear us coming. But I don't know what I'd do without one. Oh, what a beautiful tomato it is ! I used to grow tomatoes. But this year I just couldn't do it any more.”

    “I'm sorry for your challenges. It must be frustrating.” I said.

    “Well, it all requires a change in attitude, I could spend my time thinking about what I can't do any more, or spend it on what new things I can do. I loved gardening. Besides my vegetable I also planted many flowers. All those years of love and attention kept them strong, so my work paid off,” the old woman replied.

    “I love your attitude,” I added. “But tell me, what new things have you discovered? You said you needed to focus on new things you could do.” “Well, I can go to the grocery store and make new friends by running into perfect strangers with my cart,” she said. “What I've discovered is that I can't grow flowers any more, but I can paint flowers. When I hang my flowers paintings on the wall, the fresh scent stays in my soul. Since I can't get around as much and they are just there, we are a perfect match.”

    “Just like meeting you, my friend. You added beauty to my day and will brighten the dark corners of my memory just when I need it most,” I told her.