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(18分)．某同学需要用到85 mL 1 mol/L的NaCl溶液，现需在实验进行配制，填空并请回答下列问题： （1）配制1 mol/L的NaCl溶液 托盘天平称取NaCl的质量 用容量瓶的规格（可供选择的规格100 mL、250 mL、500 mL） 除容量瓶外还需要的其它仪器 （2）配制时，其正确的操作顺序是（字母表示，每个字母只能用一次） __ ______ ； A、用30 mL水洗涤烧杯内壁和玻璃棒2—3次，洗涤液均注入容量瓶，振荡 B、用托盘天平准确称取所需NaCl的质量，将量好的NaCl倒入烧杯中，再加入少量水（约30 mL），用玻璃棒慢慢搅动，使其混合均匀 C、将NaCl沿玻璃棒注入容量瓶中 D、将容量瓶盖紧，振荡，摇匀 E、继续往容量瓶内小心加水，直到溶液凹面恰好与刻度相切 （3）指出本实验的操作错误的地方，并进行更正。 。 （4）若出现如下情况，对所配溶液浓度将有何影响（填“偏高”、“偏低”或“无影响”）： ①若加蒸馏水时不慎超过了刻度 ； ②若定容时俯视刻度线___________________； ③C操作中不小心洒出有溶液 。 （5）若实验过程中出现如下情况如何处理？加蒸馏水时不慎超过了刻度线一点点 ；
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【简答题】关税与贸易总协定(GATT)(General Agreement on Tariffs and Trade，GATT)
【简答题】General Agreement on Tariffs and Trade/GATT
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【简答题】The World Trade Organization was founded in 1995. It absorbed the General Agreement on Tariffs and Trade (GATF), which covers trade in manufactured and agricultural goods. The WTO also regulates trade...
【判断题】Unlike the General Agreement on Trade in Services (GATS), the North American Free Trade Agreement (NAFTA) requires member states to list the service sectors to which the NAFTA rules do not apply. r si...
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【简答题】It is so important that it is the first article of the General Agreement on Tariffs and Trade (GATT), which governs trade in goods. MFN is also a priority in the General Agreement on Trade in Services...
【判断题】Unlike the General Agreement on Tariffs and Trade (GATT 1994), the General Agreement on Trade in Services (GATS) does not allow developed and developing member states to enter into negotiations (simil...
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正确
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错误
【判断题】The General Agreement on Trade in Services (GATS) "Annex on Air Transport Services" replaces all previously existing bilateral and multilateral agreement on air traffic rights.
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