完成B句.使其与A句意思相同或相近. A．They form a polar molecule:one with a slightly positive end and a slightly negative end． B．They form a polar molecule, , one with a slightly positive end and a slightly negativ 题目和参考答案——青夏教育精英家教网—

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完成B句，使其与A句意思相同或相近。(每空一词)

A．They form a polar molecule：one with a slightly positive end and a slightly negative end．

B．They form a polar molecule, ________ ________, one with a slightly positive end and a slightly negative end．

答案：that,is

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