题干

朝阳花园小区有960平方米草坪。这种草坪每平方米每天大约能释放氧气15克,吸收二氧化碳20克。

①朝阳花园小区的草坪每天大约能释放氧气多少克?

②朝阳花园小区的草坪每天大约能吸收二氧化碳多少克?

上一题 下一题 0.0难度 选择题 更新时间:2018-01-30 05:58:20

答案(点此获取答案解析)

解:①960×15=1440(克)②960×20=19200(克)答:①朝阳花园小区的草坪每天大约能释放氧气1440克。②朝阳花园小区的草坪每天大约能吸收二氧化碳19200克。

同类题3

完形填空
    When I spent the summer with my grandmother, she sent me down to the 1with a list, I walked up to the counter.Behind it was an old lady named Miss Bee.
    “Excuse me,”I said. She 2“I need to get these,”I continued, 3up my list.
    “So? Go get them,”Miss Bee said.“4is here except you and me, and I'm not your servant. I suggest you get yourself a basket over there and start5.”It was not 6for a 7­ year ­old child, there were so many different kinds of things. I spent over an hour in the store.
I visited Miss Bee twice a week that summer. She 7short­changed me. Other times she overcharged. Going to the store was like going into a war. But by the end of that summer, I could finish my shopping trip8around 15 minutes. The morning I was to return home, I stopped in the store again to buy something.
    “All right,”Miss Bee said. “What did you 9this summer?”
    “That you're mean!”I replied.
    Miss Bee just laughed,“ I know 10you think of me,”she said. “Well, I don't care! My job is to teach every child I meet some life 11. When you get older you'll be glad that you met me!”Glad I met Miss Bee? Ha!How could it be?
    It sounded funny until one day my son came to me with his homework. “It's too 12 . ”he said. “Could you finish the math problem for me?”
    “13I do it for you, how will you ever learn to do it  yourself?”I said. Suddenly, I was back in that store where I had learned to add up my bill by myself. Had I ever been overcharged since?
    Life is full of all kinds of 14. We may be 15 a hand once or twice, but luck may not find us every time. So we should work them out by ourselves.