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【单选题】
实际电解时,在阳极上首先发生氧化作用而放电的是A.
标准还原电极电位最大者
B.
标准还原电极电位最小者
C.
考虑极化后实际上的不可逆还原电位最大者
D.
考虑极化后实际上的不可逆还原电位最小者
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【简答题】根据反应类型的不同,滴定分析可分为 、 、 和 四种滴定分析方法。
【单选题】宝洁公司和联合利华公司都是生产日用化工商品的企业是一对竞争对手从消费需求的角度来看他们属于()
A.
愿望竞争者
B.
普通竞争者
C.
产品形式竞争者
D.
品牌竞争者
【单选题】The first flying vertebrates were true reptiles in which one of the fingers of the front limbs became very elongated, providing support for a flap of stretched skin that served as a wing. These were t...
A.
Characteristics of pterosaur wings
B.
The discovery of fossil remains of Archaeopteryx
C.
Reasons for the extinction of early flying vertebrates
D.
The development of flight in reptiles and birds
【简答题】滴定分析方法的分类?
【简答题】The first year of school in America, known as kindergarten(幼儿园), usually begins between the ages of five and six. Among rich countries such a late start is very strange. President Obama believes it is...
【多选题】依据不同的反应类型，滴定分析方法可分为酸碱滴定法（中和法）、沉淀滴定法（容量滴定法）和（）。
A.
氧化还原滴定法
B.
配位滴定法（络合滴定法）
C.
化学分析法
D.
仪器分析法
【单选题】The very first known settlers of Britain were _________ .
A.
the Celts
B.
the Anglo-Saxons
C.
the Romans
D.
the Iberians
【单选题】What is known about the influenza virus?
A.
It was first found in a group of very old birds.
B.
All the different strains can be found in wild birds.
C.
It existed over 100 million years ago.
D.
It can survive in many different places.
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