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(2005•重庆)不等式组的解集是________.
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(2005•重庆)不等式组
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAADgAAAAoCAYAAACrUDmFAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
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65invPaQW1Ot/3EtzS1tEToekK/ulg2l6OtqeBUYOc7jn6kW5C7pAFRFr0TAONkwaIk12fiVN/bB
JNKiHwH0y4bxDmZvzD13E/T9LsqyliUbxoPJkY44DK3iBeXeoIrQR5IMRuBh2VDE8T5VzQX6tjJx
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)
的解集是________.
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(2005•重庆)不等式组
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(2005•重庆)不等式组
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(2005•重庆)据国家商务部消息,2005年一季度,我国进口总额达2 952亿美元.用科学记数法表示这个数是( )
A.2.952×102亿美元
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(2005•重庆)计算:
=________.
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(2005•重庆)方程
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(2005•重庆)(1)计算:|-1|+5-
•sin45°+2-1;
(2)化简:
.
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(2005•重庆)(1)计算:sin30°+2-1-(
-1)+|-5|;
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