小米粘线刷包:请帮忙解答英语阅读试题3
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In modern industry, water fulfills several essential functions
essential等于:
A. ideal B. actual C. compulsory D. necessary
essential等于:
A. ideal B. actual C. compulsory D. necessary
D. necessary
essential是本质的,实质的
B actual实质的
c
D