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【单选题】
类推是化学学习中常见的思维方法。以下几个类推结果正确的是 [ ]A.
氧化物都含有氧元素，所以含有氧元素的化合物一定是氧化物
B.
酸和碱反应生成盐和水，所以生成盐和水的反应一定是酸和碱的反应
C.
燃烧一般伴随发光、放热现象，所以有发光、放热现象的就是燃烧
D.
在常温条件下，PH>7的溶液显碱性，所以碱性溶液的PH一定大于7
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【判断题】The international treaties and conventions have unified the rules and norms governing international trade, thus national law plays a little role in international trade law.
A.
正确
B.
错误
【简答题】How much must a patient pay the doctor in the next town for his first visit? He must pay ______.
【简答题】句型转换 1. We must clean the classroom every day.(同义句转换) We must _______ the classroom _______ every day. 2. It took me two days to finish the book.(同义句转换) I _______ two days _______ the book. 3. You sho...
【判断题】The CISG is therefore considered one of the core international trade law conventions whose universal adoption is desirable.
A.
正确
B.
错误
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