If [G,*] is a group, then * is()
A: Satisfied combination law
B: Have Unit element
C: Every unit has inverse element
D: Exchangeable
A: Satisfied combination law
B: Have Unit element
C: Every unit has inverse element
D: Exchangeable
举一反三
- If [G,*] is a group, then * is() A: Have identity element and can be combined B: Satisfy the law of Union and the law of exchange C: Have identity element and satisfy the law of exchange D: Have inverse, zero element
- If [G,*] is a group, then * is() A: Have identity element and can be combined B: Satisfy the law of Union and the law of exchange C: Have identity element and satisfy the law of exchange D: Have inverse, zero element
- Every element in an array has the same type. A: 正确 B: 错误
- 利用DTD定义XML元素包含子元素，下面哪个选项（ ）的语法形式是正确的？ 未知类型：{'options': ['[!ELEMENT 父元素名 ]（子元素名1,子元素名2,…）[!ELEMENT 父元素名/]', '[!ELEMENT 父元素名 子元素名1,子元素名2,…]', '[!ELEMENT 父元素名 （子元素名1,子元素名2,…）]', '[!ELEMENT （子元素名1,子元素名2,…）父元素名 ]'], 'type': 102}
- Which of the followings are the definition for word? A: smallest meaningful unit B: stand in isolation C: the smallest unit of grammatical analysis D: combination of form and meaning