单选9. ______ it is said by authority，it still needs to be proved by experiments.
·Now that
·Eveif
·If only\t
·So long as
出自：运营管理
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单选9. ______ it is said by authority，it still needs to be proved by experiments.
·Now that
·Eveif
·If only\t
·So long as
出自：运营管理