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【简答题】
设S n 和T n 分别为两个等差数列的前n项和，若对任意n∈N * ， S n T n = 7n+1 4n+27 ，则第一个数列的第11项与第二个数列的第11项的比是______．（说明： a n b n = S 2n-1 T 2n-1 ．）
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举一反三
【单选题】What does Mia want to do instead of going to the audition?
A.
She wants to find a different job.
B.
She wants to go back to school.
C.
She wants to go on vacation.
D.
She wants to keep studying acting.
【单选题】Sarah likes ________ to the cinema _______ her friends. [ ]
A.
going; and
B.
going; with
C.
goes; with
D.
go; with
【简答题】钢结构焊接工艺审查主要应考虑哪些因素?
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