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如图是几种生物的基本结构单位,请据图回答下面的问题:

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同类题1

关于x的方程x2﹣x+a=0有实根.

同类题2

      Once, a king showed two men a large basket in the garden. He told them to fill it with water from a well. After they1 their work, he left them, saying, “When the sun is down, I will come and see your work.”
  At last one of them said, “What's the use of doing this foolish work? We can 2 fill the basket.”3 man answered, “That is none of your business.” The first man said. “You may do as you like, but I am not going to work at4 so foolish.” He5his bucket and went away. The other man said no word, and kept on carrying 6. At last the well was almost 7.
  As he poured the last bucket of water into the basket, he saw a bright thing in it. He picked it up. It was a beautiful gold ring. Just then the king came.8he saw the ring, he knew that he had found the kind of man he wanted. He told him to keep the ring for himself. “You 9so well in this little thing,” he said, “ 10now I know I can believe you with many things.”

同类题3

People in Yangzhou _______ walk or ride bikes, but now they ________ taking the bus or riding cars.

同类题4

有关太阳系中行星的叙述,不正确的是(    )

同类题5

用计算器计算124×115,按键的顺序为(  )

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