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【单选题】
设某树的度为3,且度为3的结点数为4,度为1的结点数为9,没有度为2的结点。则该总的结点数为A.
13
B.
不可能有这样的树
C.
22
D.
21
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参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】把棱长为1厘米的小正方体，按下图方式叠放在桌面上，每增加一个正方体，表面积增加（ ）平方厘米。
【单选题】The judgments involved in the presentation of a so-called 'factual' or 'objective' story are
A.
like those involved in interpretation.
B.
totally different from those involved in interpretation.
C.
based on hard facts without any interpretation.
D.
only personal ideas of the reporter and editor.
【简答题】在上一个练习的基础上,实现供应商表的增加操作
【单选题】______ the presentation of the film, ambient noise from neighboring theaters made it very hard for the audience to concentrate on what they were watching.
A.
Into
B.
Within
C.
Along
D.
Throughout
【简答题】晨会 morning a___________
【简答题】90% of the credit amount must be paid ______ the presentation of documents.
【单选题】The presentation of the Film Festival will be covered live tonight. It’s worth ________.
A.
watches
B.
watch
C.
watching
D.
being watched
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