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【简答题】
设级数 收敛，证明级数 也收敛。
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举一反三
【单选题】Li Ping has worked in the company for many years. He is a ________ .
A.
window
B.
wall
C.
book
D.
manager
【单选题】—What a nice picture！But it is too small. —I'm glad you like it. I'll ask a photographer to________it. [ ]
A.
improve
B.
reduce
C.
enlarge
D.
appreciate
【单选题】What a nice picture! You draw very well.
A.
Yes, not so bad.
B.
Yours is good.
C.
Of course not.
D.
Thank you.
【简答题】在铺筑沥青面层之前,在基层上浇洒乳化沥青等,形成的透入基层表面的薄层称为____。而为加强路面的沥青层与沥青层之间、沥青层与水泥混凝土路面之间的粘结,洒布由沥青材料做成的薄层,称为___________。
【单选题】Oh, what a nice picture! You draw very well.
A.
Yes, it's very bad.
B.
Yours is good.
C.
Thank you.
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