Oxygen is a/an ___. A. element B. compound C. mixture D. solution 相关知识点: 试题来源: 解析 A。氧是一种元素。选项 A“element”是元素,氧是元素;选项 B“compound”是化合物;选项 C“mixture”是混合物;选项 D“solution”是溶液。
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百度试题 结果1 题目Which of the following is a compound? A. Oxygen B. Hydrogen C. Water D. Nitrogen 相关知识点: 试题来源: 解析 C。水(Water)是化合物。氧气(Oxygen)、氢气(Hydrogen)和氮气(Nitrogen)都是单质。
Water is a compound c___ the elements of hydrogen and oxygen.(根据首字母单词拼写) 相关知识点: 试题来源: 解析 containing [解析] 考查非谓语动词。句意:水是一种含有氢和氧元素的化合物。根据句意以及首字母提示,空处应用动词contain,表示“包含,含有”,contain与逻辑主语compound之间是主动关系,所以空处...
Water is a compound containing the elements h and oxygen. (根据首字母单词拼写) 相关知识点: 试题来源: 解析 hydrogen 【详解】 考查名词。句意:水是一种含有氢和氧元素的化合物。根据连词and后的名词oxygen可知,用名词形式。根据首字母提示及句意,故填hydrogen。
百度试题 结果1 题目Water is a compound containing the elements___(氢) and oxygen.相关知识点: 试题来源: 解析 hydrogen
Water is a compound___ the elements hydrogen and oxygen. (contain) 相关知识点: 试题来源: 解析 答案:containing.所给词contain的意思是"包含;含有",及物动词,本句为主系表结构,设空处应用非谓语动词作定语修饰compound,compound与contain之间为主动关系,应用现在分词形式,故填containing...
基础练习——单句语法填空(1)Water is a compound(contain) theelements hydrogen and oxygen.(2)Be especially careful of information(contain) in advertisements.(3)He was so excited that he could hardly contain(he). 相关知识点: 试题来源:
Relates to the manufacture and use of the oxygen-containing heterocyclic compound or a nitrogen-containing heterocyclic compounds having insecticidal activity, which is formed by using a dialdehyde, or (C) the present invention provides a compound of formula (A), (B), (D a compound having a ...