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【单选题】
下列对硼酸性质的描述,不正确的是(    )。
A.
硼酸是三元酸
B.
硼酸的酸性是由于加合氢氧根离子,而不是给出质子
C.
硼酸是一元弱酸
D.
硼酸与多元醇反应生成络合酸使酸性增加
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【单选题】The U.S. condemned
A.
it's Vice President for visiting Jerusalem.
B.
Jewish settlers for occupying East Jerusalem.
C.
Israeli's decision to allow more housing units for Jewish settlers.
D.
Joe Biden's statement from Jerusalem.
【简答题】交换式局域网和共享式局域网的区别在哪?
【简答题】Different froms of maps are appearing. They allow independent travelers to get local knowledge of places they are visiting, from the official to the unusual. Meanwhile hi-tech developments are creatin...
【单选题】After three years of preparation for the 2011 Xi’an International Horticultural Expo (西安园博) 会),the city is presenting the world______ many people think is the green Special Olympics.
A.
that
B.
which
C.
what
D.
where
【单选题】听力原文: A famous writer who was visiting Japan was invited to give a lecture at a university to a large group of students. As most of them could not understand spoken English, he had to have an interpre...
A.
To tell a story to a group of students.
B.
To translate some books.
C.
To act as an interpreter.
D.
To give a lecture at a university.
【单选题】How can you be respectful when visiting others’ homes?
A.
Allow the host or hostess to tell you where to sit.
B.
Allow the host or hostess to tell you where to leave your purse.
C.
Allow the host or hostess to tell you whether or not to take off your shoes.
D.
All of the three.
【单选题】以下选项,不属于程序流程图基本元素的是:
A.
循环框
B.
连接点
C.
判断框
D.
起始框
【单选题】paragraph 3___________
A.
Preparation for taking a citizenship test
B.
Citizenship tests in European counties
C.
Importance of promoting integration
D.
Necessity to know the branches of government
E.
Different On the new citizenship test
F.
Goal of the new citizenship test
【多选题】在整个社会主义初级阶段毫不动摇地坚持党的基本路线( )。
A.
关键是坚持以经济建设为中心不动摇
B.
必须正确处理两个基本点之间的关系
C.
必须把两个基本点在建设中国特色社会主义的实践中统一起来
D.
必然警惕右,更主要是防止“左”的错误
E.
必须坚持以法治国的基本方略
【单选题】Year after year a dedicated Swedish chemist worked to find a substance which, when【C1】______nitroglycerine (硝化甘油), would make explosives safer to handle【C2】______weakening their force. He had a person...
A.
mixing with
B.
mixed with
C.
was mixing with
D.
was mixed with
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