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溶剂提取法选择溶剂的原则是()。常用提取溶剂可分为水、高极性有机溶剂和()。
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推荐知识点:
In a sales contract of tinned goods, the contract stipulates: 24, 000 tins of goods shall be packed in 1000 cases, 500 grams each tin and 24 tins in a wooden case. When the buyer received the goods,he found the goods were packed in 500 cases,48 tins each case , and 500 grams each tin. The buyer rejected the goods. Question: Does the buyer have the right to do so? (Translate the case into Chinese and then answer the question) Helpful hint: The case is mainly about packing clause in a contract.
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