问题 单项选择题

在一个无向图中,所有顶点的度数之和等于所有边数的( )倍。

A) 3
B) 2
C) 1
D) 1/2

答案

参考答案:B

解析: 在一个无向图中,所有顶点的度数之和等于所有边数的2倍。

写作题

书面表达。

     下面是一份英语学习自我评价表,每个评价项目后有若干个选项。请在符合自己实际情况的选项

方框中打√(可以多选)。根据你的选择,以“My English Learning”为题写一篇短文,介绍你英语学习

中的优势与不足,并针对自己的不足之处,提出改进方法。

     注意:1. 语言通顺,意思莲贯,书写规范;

               2. 词数80左右。短文开头已经写好,不计入总词数。

English Learning Sell-assessment

1. The new words I can remember:

     □ all □ most □ some □ several

2. My favorite activities:

    □ work □ writing □ doing grammar exercises □ learning new vocabulary □ class discussions

3. The most difficult part in English learning:

   □ reading □ listening □ grammar □ vocabulary □ speaking □ writing

4. The useful ways in English learning:

    □ keeping a vocabulary notebook □ taking an active part in class discussions

    □ doing English duty reports □ reading texts aloud □ preparing lessons carefully before class

5. Need to be improved in learning areas:

     □ listening □ reading □ speaking □ writing □ grammar

     □ vocabulary □ pronunciation □ working with others

                                               My English Learning 

      English is a very important subject at school. _________________________________________

__________________________________________________________________________________

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选择题