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【简答题】
假设在，如果结点x是结点y的双亲时，用(x,y)来表示，已知一棵树的的集合为{(i,m)，(i,n)，(e,i)，(b,e)，(b,d)，(a,b)，(g,j)，(g,k)，(c,g)，(c,f)，(h,l)，(c,h)，(a,c))，请用树形结构画出此树，并回答下面的问题。 (1)哪个是根结点? (2)哪些是? (3)哪个是g的双亲? (4)哪些是g的祖先? (5)哪些是g的孩子? (6)哪些是e的子孙? (7)哪些是e的兄弟? (8)树的深度是多少? (9)树的度数是多少?
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反馈参考答案：
举一反三
【简答题】C Statistically, air travel is by far the safest way to travel, and you can make flying even safer, just by following these rules．As your chances of being involved in an air accident are practi...
【单选题】Before you travel to America, make sure your passport is( ).
A.
valid
B.
insurance
C.
visa
D.
clean
【简答题】在下列装置中,属于内燃机的是( )。I.燃气轮机 II.蒸汽轮机 III.煤气机 IV.汽油机 V.柴油机 VI.蒸汽机A. Ⅱ+Ⅲ+Ⅳ+Ⅵ B. Ⅰ+Ⅲ+Ⅳ+Ⅴ C. Ⅱ+Ⅳ+Ⅴ+Ⅵ D. Ⅰ+Ⅲ +Ⅴ+Ⅵ
【判断题】It is obvious that adequate preparations for business travel will make your travel more comfortable.
A.
正确
B.
错误
【简答题】Statistically, air travel is by far the safest way to travel, and you can make flying even safer, just by following these rules. As your chances of being involved in an air accident are practic...
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