问题 填空题

下列命题中,属于真命题的是______________.

①带根号的数都是无理数;

②两条线被第三条线所截,同位角相等;

③a,b,c是直线,若a∥b,b∥c,则a∥c;

④a,b,c是直线,若a⊥b,b⊥c,则a⊥c;

⑤0.01是0.1的一个平方根;

⑥0的平方根和算术平方根都是0;

⑦无限小数都是无理数.

答案

③⑥

题目分析:①错误,无理数是无限不循环小数。=2不是无理数。②错误:两直线平行,同位角相等。

④错误。a,b,c是直线,若a⊥b,b⊥c,a,c可能是同一直线。⑤错误0.01是0.0001的一个平方根。

⑦错误。无理数是无限不循环小数。只有③⑥正确。

点评:本题难度较低,主要考查学生对命题知识点的掌握。抓住无理数是无限不循环小数的概念机平行线性质等判断即可。

问答题
写作题

阅读下面短文,然后按要求写一篇150词左右的英语短文。

An increasing number of students fall in love at an early age and create problems with their studies, which has aroused the school’s attention. A middle school has set a "distance for civilized communication" between boy and girl students. Boys and girls should keep a distance of at least 50 centimeters when they talk in public, otherwise they will be criticized or get an even severer punishment, says an article in Beijing News.

It seems that the school has passed the school regulation to prevent girls and boys from falling in love at an early age and creating problems for the school authorities. Some teachers and parents approve of the regulation because it is of vital importance to the teenagers’ study. However, many experts say the problem, if it is one, can be better solved through communication.

It is natural for a teenager to have a feeling of love on someone from the opposite sex. It is natural for girls and boys to be attracted to each other as they mature sexually.

In fact, normal communication between boy and girl students is good not only for their emotional development and personality refinement, but also for their relationship when they grow up.

[写作内容]

1.以约30个词概括上文的主要内容。

2.以约120个词描述“文明交往距离规定”的利弊,并谈谈你对异性交往的看法。

[写作要求]

1.作文中可以参照阅读材料的内容,但不得直接引用原文中的句子。

2.作文中不能出现真实姓名和学校名称。