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第16 至 20 題為題組 One factor that separates a living thing from an inanimate object is the organism’s ability to carry out chemical reactions that are crucial for its survival. Imagine the infinite amount of reactions that a large organism such as human carries out every single day. 16 of these reactions are possible without enzymes. Enzymes consist of various types of proteins that work to drive the chemical reactions 17 for certain types of nutrients to take effect. Enzymes can either launch a reaction or speed it up. In the absence of enzymes, reactants may take hundreds of years to convert into a usable product, if they are able to do so 18 . This is why enzymes are crucial in the sustenance of life on earth. Enzymes, 19 , do not always function perfectly. In 1902 Sir Archibald Garrod was the first to attribute a 20 to an enzyme defect, which he later referred to as an “inborn error of metabolism.” Today, newborns are routinely screened for certain enzyme defects such as PKU (phenylketonuria) and galactosemia, an error in the handling of the sugar galactose.
【題組】17.
(A) requires
(B) required
(C) requiring
(D) to require

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quainted 幼兒園下 (2017/07/09)

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peggyiii2002 國三上 (2018/07/31)

Enzymes consist of various types of proteins (that work to drive the chemical reactions)( 17 for certain types of nutrients to take effect.)

(that work to drive the chemical reactions)修飾protein

( 17 for certain types of nutrients to take effect.)修飾chemical reactions

所以原本句子為....chemical reactions which are required for certain types of nutrients to take effect→此種化學反應是某些營養素作用的必要條件
省略which 改成being required再省略being

所以答案是 required 


第16 至 20 題為題組 One factor that separates..-阿摩線上測驗