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已知一个底面是菱形的直棱柱的侧棱长为5,菱形的对角线的长分别是9和15,则这个棱柱的侧面积是(  )


A:3034

B:6034

C:3034+135

D:135

上一题 下一题 0.0难度 选择题 更新时间:2019-01-16 11:08:34

答案(点此获取答案解析)

A

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3____98<3200

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These long ____(句子) make me feel bored.

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完形填空

    Mr. Black was over fifty years old. He sometimes made some mistakes in his work, and he lost his work. So he had1time every day to do something. Then he often met his old friends under a big tree. They had drinks there and2anything they liked.

    One day, some old men were sitting together again and talking about young people in this world. They all agreed that the old people were3than young people. Then one of the old4said that young men were stronger than old men.

    5of them agreed that this was true,6Mr. Black didn't. He said, “No. I am as strong now as when I was a young man.” His friends were surprised7what he said.

    “Well,” said Mr. Black, “Near my house there is a big stone. When I was a young man, I used8to move it, but I couldn't because I was not9. I am an old man now, and when I try to move it, I still10. So, I am as strong as when I was young.”

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