问题
选择题
The performance last week was by no means . [ ]
A. satisfy
B. satisfactory
C. satisfied
D. satisfaction
答案
答案：B
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The performance last week was by no means . [ ]
A. satisfy
B. satisfactory
C. satisfied
D. satisfaction
答案：B
，其中α是当Δx→0时的无穷小量，则y(x)=______．