问题
选择题
| Come to the book store and see for _______. |
A. you B. your C. yours D. yourself |
答案
答案：D
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| Come to the book store and see for _______. |
A. you B. your C. yours D. yourself |
答案：D
收敛的充要条件是β满足______，其中α，β为常数，且a≠0．