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【简答题】
设数列 ，且数列 是等差数列， 是等比数列． （1）求数列 的通项公式； （2）设数列 的前 为 ，求 的表达式； （3）数列 满足 ，求数列 的最大项．
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【单选题】This morning our head teacher came to school _________ than ________ student in our class.
A.
much early; any
B.
much earlier; any
C.
much early; any other
D.
much earlier; any other
【简答题】按误差的表示方法,误差可分为 和 。
【单选题】This morning our head teacher came to school _________ than ________ student in our class.
A.
much early; any
B.
much earlier; any other
C.
much early; any other
D.
much earlier; any
【简答题】误差的表示方法分为____和___
【单选题】Our English teacher came to our school __________.
A.
in her thirty
B.
on her thirties
C.
on her thirty
D.
in her thirties
【单选题】While we______ with the president, our English teacher came in.
A.
are talking
B.
were talking
C.
would talk
D.
have talked
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