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【简答题】
翻译:君不见,明镜悲白发,青丝暮成雪。
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皮皮学刷刷变学霸
举一反三
【多选题】Which of the following statements about declaration are true？（）
A.
Declaration of primitive types such as boolean， byte and so on does not allocate memory space for the variable.
B.
Declaration of primitive types such as boolean， byte and so on allocates memory space for the variable.
C.
Declaration of nonprimitive types such as String， Vector and so on does not allocate memory space for the object.
D.
Declaration of nonprimitive types such as String， Vector ans so on allocates memory space for the object.
【简答题】The accurate declaration for the export goods is made by the ( ).
【多选题】以下有关IP地址和域名地址说法错误的是( )
A.
IP地址是由一串0,1组成的二进制数字串。
B.
286.55.43.126是一个有效的IP地址。
C.
域名地址从右到左是由地区名称、组织类型、组织名称、计算机名称等组成
D.
www.gxtznn.com是一个无效的域名地址。