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【简答题】
取2 只 100ml 锥形瓶,分别依次加入样品4.00g,5.0ml蒸馏水,5.0ml中性甲醛,0.5%酚酞乙醇溶液4滴,氢氧化钠滴定液滴定,分别消耗氢氧化钠滴定液30ml、20ml。同时,取1只100ml锥形瓶做空白对照实验,空白组消耗氢氧化钠滴定液5ml。本实验中,两个锥形瓶中样品的质量一共是( )g。(答案保留到小数点后两位有效数字 )
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【简答题】The claims concerning the quality of the commodity shall be lodged within 30 days after the arrival ofthe cargo at the port ofdestination.
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【单选题】After ________ the quality of this new machine, we are ready to go into production. [     ]
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【简答题】After reinspection at the port of destination, the quality of the goods shipped ex S.S.“Red Star” under Contract No. CT7543 was found not in compliance with the contract stipulations.(英译中)
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【单选题】门框胶条缺损开裂,应考虑( )
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