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A.aboutB.againstC.withD.for

A. about
B. against
C. with
D. for

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A.propertyB.incomeC.investmentD.premises

A. property
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C. investment
D. premises

A.assertB.defineC.judgeD.assume

A. assert
B. define
C. judge
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A.premiumB.priceC.reliefD.property

A. premium
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按GB/T 1800.2—2009的规定，常用尺寸孔和轴的标准公差等级各分为______等二十级。按GB/T 307.1—2005的规定，向