______adequate precautions are taken there is no risk involved in the operation.A.Althoug

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______adequate precautions are taken, there is no risk involved in the operation.

A.Although

B.Providing

C.Nevertheless

D.Even

请帮忙给出正确答案和分析,谢谢!

热搜:关于氨基酸代谢错误的论述是_________。