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【单选题】
I ____ an expensive gift for my birthday, but I could not ____ it.A.
accepted, received
B.
received, accept
C.
accepted, receive
D.
accepted, received
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反馈参考答案：
举一反三
【单选题】(2018· 云南中考 ) 按一定规律排列的单项式: a ,- a 2 , a 3 ,- a 4 , a 5 ,- a 6 ,...,第 n 个单项式是 ( )
A.
. a n
B.
.- a n
C.
. ( - 1) n + 1 a n
D.
. ( - 1) n a n
【简答题】Search for all the affixes practiced in “WORD BUILDING ”exercises in each unit of BOOK I , II, III, and IV , and in a very efficient way,collect them,arrange them ,list them with citations ,generali...
【单选题】(2019・云南中考)按一定规律排列的单项式:x 3 ,-x 5 ,x 7 ,-x 9 ,x 11 ......第n个单项式是( )
A.
(-1) n -1 x 2n -1
B.
(-1) n x 2n -1
C.
(-1) n -1 x 2n +1
D.
(-1) n x 2n +1
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