Several enzymes from the pancreatic juice and lining of the intestine carry out the breakdown of huge _________ molecules into small molecules called amino acids.

单选题

Several enzymes from the pancreatic juice and lining of the intestine carry out the breakdown of huge _________ molecules into small molecules called amino acids.

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单选题

Australia has several different climatic regions，from warm to( )and tropical.

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from

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单选题

Several of the administrative participants recognized the support and leadership from their institution’s chief executive officers as a serious motivating factor at those moments _____.

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