13、为了保证信息安全传输必须使用加密方式，有一种方式其加密、解密原理如下：

明文　　　　　　　　　 密文　　　　　　　 密文　　　　　　　　　 明文

已知加密为为明文、为密文，如果明文“”通过加密后得到密文为“”，

再发送，接受方通过解密得到明文“”，若接受方接到密文为“”，则原发的明文

是　　　　 。

12、抛物线的准线方程是______。

11、输入x＝5，运行下面的程序之后得到y等于_____。

　　　　 Input x

If　 x<0　 then

y=(x+1)*(x+1)

Else

y=(x-1)*(x-1)

　　　　 End if　 　

Print y

End

3．本文要注意，概要一定要根据文段的时态来写。同时，绝对不能抄袭原文的句子。作文中可使用自己的亲身经历或虚构的故事时，一般使用一般过去时态较为常见。而结论性的观点应使用一般现在时或一般将来时态。

　　 I will never Forget My Teacher

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答案:

　　　 I will Never Forget My Teacher

　　　 When the student was upset, the teacher told him about his own attitude towards life and encouraged him to face bravely pains and gains in life, which helped him finally defeat his depression.

　　　 Teachers play an important role in us students' growth. We can't grow up well without our teachers. A good teacher can help his students out to great successes. He can also encourage his students to be brave when they are upset and in trouble. What is more, a good teacher can make you independent and confident. I will never forget my English teacher, Mr. Li, who never looked me as a stupid student; he always gave a lot of encouragement and kind help, which led to my good command of English.

　　　 Teachers' love is unforgettable. Their kind help will be of great benefit to us forever.

2．本文的概要必须包含以下要点：the student was upset / his teacher told him about his own attitude towards life/his teacher encouraged him to face bravely pains and gains in life.

1．写作有可能用到的主要短语和单词：鼓励encouragement，鼓励某人做某事encourage sb to do sth, 学会自强learn to be independent, 自信confidence／confident，成功succeed／success,情感低谷be upset，勇敢面对生活中的痛苦face bravely pains in life.

2．作文中不能出现真实姓名和学校名称。

[评分标准]概括准确，语言规范，内容合适，篇章连贯。

[写作辅导]

2．然后以约120个词就“老师对学生人生的影响”这个主题发表你的看法，并包括下面要点。

　 1)你对好的老师和不好的老师对学生的人生影响有何感想。

　 2)以你的生活经历为例，说明老师对你成长的影响。

[写作要求]

1．以约30个词概括短文内容。