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【单选题】
设有两个数列【图片】,【图片】，且【图片】,则（）A.
， 必都收敛，且极限相等
B.
， 必都收敛，但极限未必相等
C.
收敛， 发散
D.
， 可能散，也可能都收敛
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举一反三
【单选题】Under normal circumstances the body can ( ) these naturally occurring substances into vitamins.
A.
convert
B.
render
C.
derive
D.
originate
【单选题】They sparkle and glitter in the light. No other rocks are so hard. They are very valuable. It might cost thousands and thousands of dollars to buy just one. Most are found in the ground. The largest o...
A.
they sparkle and glitter in the light
B.
they are very hard
C.
they are very valuable
D.
they are tiny
【单选题】Under no circumstances ______ to Guilin for the holiday.
A.
we can consider to go
B.
can we consider to go
C.
we can consider going
D.
can we consider going
【简答题】You can keep yourself from the rain under it.
【简答题】餐饮管理最基本、也是最根本的任务是( )。
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