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    exist A. [ig′zist] B. [ik′sist] C. [e′ksist] D. [′egzist] 【查看更多】

     

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    Though ______, many laws of nature exist.

    　 A. not having been discovered 　 B. having not been discovered

    　 C. not having discovered 　    D. having not discovered

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    Though ______, many laws of nature exist.

    　 A. not having been discovered 　 B. having not been discovered

    　 C. not having discovered 　     D. having not discovered

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    Though ______, many laws of nature exist.

    　 A. not having been discovered 　 B. having not been discovered

    　C. not having discovered 　 D. having not discovered

     

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    Though ______, many laws of nature exist.

    　 A. not having been discovered 　 B. having not been discovered

    　 C. not having discovered 　 D. having not discovered

     

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    exist　 A. experience 　B. examine　 　C. excite　　　 　D. explode

     

     

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