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【单选题】
在下列反应过程中，有3mol电子转移的是A.
lmol钠与水反应
B.
27g铝与足量盐酸反应
C.
22.4L氧气（标准状况）与足量镁反应
D.
1.5mol Na 2 O 2 与足量水反应
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皮皮学刷刷变学霸
举一反三
【单选题】. ______ online shopping has accounted for a large part of the total purchase volume, many people think the traditional shopping style is irreplaceable.
A.
Because
B.
Once
C.
Unless
D.
Although
【简答题】class Person{ String name,department; int age; public Person(Stringn){name=n;} public Person(String n, int a){name=n;age=a;} publicPerson(String n,String d,int a){ doing the same as two argumentsversi...
【单选题】Which of the following is correct way to refer to a string value named text_name in String.xml?
A.
R.string.text_name
B.
@string/text_name
C.
A and B
D.
None of the above
【简答题】以下程序有何错误? abstract class Name{ private String name ; public abstract boolean isSupidName(String name) {} }
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