计算：(13)-1-5×15+38-数学

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• 计算：（a-1b2）3=______；π0+3-2=______．-数学
• 下列各式中正确的是（）A．-x+y-x-y=1B．1-x+y=-1x-yC．a2÷a-3=a-1D．yx=y2x2-数学
• It is evident that success lies _____ hard work; ______ other words, hard work leads to success．A．on
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• 计算：（-2）2-（1-2）0-数学
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• 计算：（1）(π-1)0+(12)-1+|5-27|-23（2）已知x=2-32+3，y=2+32-3，求x2+y2的值．-数学
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• He made one big mistake, and , ______, lost his job.A．in a wordB．in factC．at lastD．as a result-高二英语
• 计算3-1的结果是（）A．13B．-13C．3D．-3-数学
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• 计算：（1）32+18-18；（2）(2-3)0+|3-23|-12．-数学
• The computers in the other shop will be ______， but ______ as those in this shop.A．cheaper； not as
• 下列运算正确的是（）A．（a-3）-2=a-5B．ab=acbcC．-a+ba-b=-1D．x+my+m=xy-数学
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• （-2003）0×2÷12+（-13）-2÷2-3．-数学
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• 下列各式计算正确的是（）A．-2-2=-14B．2x-2=12x2C．3-3=-19D．（3-π）0=0-数学
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