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问题
填空题
若x=-1是方程4kx+1=0的解,则k=( )。
答案
选择题
By the time I got up, my mother _____the breakfast well.
A. has cooked
B. cooked
C. have cooked
D. had cooked
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选择题
目前我国共有多少个省和民族( )
A.23、56
B.36、40
C.34、56
D.28、55
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