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问题
选择题
I didn't sleep ______ last night. I feel tired now.
A. well
B. nice
C. fine
D. good
答案
答案:
A
填空题
分解因式:25-a
2
=______.
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选择题
下列计算中,结果正确的是
A.2
x
2
+3
x
3
=5
x
5
B.2
x
3
·3
x
2
=6
x
6
C.2
x
3
÷
x
2
=2
x
D.(2
x
2
)
3
=2
x
6
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