Halloween customs came to the United States from Britain.()
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Spam blockers are a kind of virus which prevents your email box from receiving any emails.()
Organic food is common in mountainous regions.()
The ideas of writers like John Locke had an effect upon the American Declaration of Independence.()
脂肪酸合成的关键酶是
A. 三酰甘油脂肪酶(HSL)
B. 肉碱脂酰转移酶I
C. HMGCOA合成酶
D. HMGCOA还原酶
E. 乙酰COA羧化酶
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