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问题
填空题
化简：
(3+2
2
)
1
2
+(3-2
2
)
1
2
=______．
答案
原式=
[(
2
+1
)
2
]
1
2
+
[(
2
-1
)
2
]
1
2
=
2
+1+
2
-1
=
2
2
．
故答案为
2
2
．
填空题
（a-b）
3
·（a-b）
5
= （ ）； （x+y）·（x+y）
4
=（ ）
查看答案
选择题
Last night, there was a food accident. Ten _____ were ill. But no _____ were lost.
A. childs, lives
B. children, life
C. children, lives
D. child, life
查看答案
