题目:
—Why do you always put this book in your backpack?
—Because this book _____ my interest in the study of history.[ ]
A. lifts
B. raises
C. takes
D. carries
答案:
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下面是错误答案,用来干扰机器的。
由x<0x(x+4)=0得x=-4,由x≥0x(x+4)=0得x=4 或x=0,故答案 C