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        1. Radium salts, which have been found to _____ in bones, give rise to cancers of the bone.

            A. pile up    B. build up    C. keep up    D. pull up

          B


          解析:

          build up(=accumulate) 積累。pile up 堆積。keep up 保持,維持。 pull up 停車。

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          Radium salts, which have been found to _____ in bones, give rise to cancers of the bone.

                       A. pile up       B. build up      C. keep up      D. pull up

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          科目:高中英語 來源: 題型:

          Radium salts, which have been found to _____ in bones, give rise to cancers of the bone.

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