问题 解答题

一个长方体水箱长12dm、宽10dm、水深6dm,将一块铁皮放入水箱内(全部浸没),这是水箱水位上升了2.5dm,这块铁皮的体积是多少?如果把这块铁皮锻造成长和宽都是10dm的一个长方体铁块,并在这个长方体的表面涂上防锈漆,那么涂漆的面积是多少?

答案

(1)12×10×2.5,

=120×2.5,

=300(立方分米);

答:这块铁皮的体积是300立方分米.

(2)300÷(10×10),

=300÷100,

=3(分米);

10×10×2+10×3×4,

=200+120,

=320(平方分米);

答:涂漆的面积是320平方分米.

阅读理解

阅读理解。

     Jenny began to go to school when she was at the age of six. She liked her first day very much.

Her teacher, Miss Black, was very nice, too.

     At the end of the second day, the other children left the classroom after school, but Jenny stayed

behind and waited.At first, Miss Black had some work to do and did not see Jenny, but then she looked

up and saw her.

     "Why not go with the others,Jenny?"she asked her kindly,"Did you want to ask me some

questions?"

      "Yes, Miss Black," Jenny said.

     "What is it?" Miss Black asked.

     "What did I do in school today?"Jenny said.

      Miss Black laughed, "What did you do in school today?" she said, "Why did you ask me

that, Jenny?"

      "Because I'm going home now," Jenny answered, "and my mother's going to ask me."

1. Jenny went to school _____.

A. when she was too old

B. when she was at the age of seven

C. when she was six years old

D. when she was old

2. The second day, Jenny didn't go with _____.

A. her teacher

B. her classmates

C. her mother

D. her father

3. Why did Jenny stay behind and wait after school? Because she _____.

A. had some homework to do

B. waited for her mother

C. waited for her teacher to come

D. wanted to ask her teacher a question

4. What question did Jenny ask her teacher?

A. What did you do in school today?

B. Did you want to ask me some questions?

C. Why didn't you go with the others?

D. What did I do in school today?

5. Why did Jenny ask such a question? Because _____.

A. her mother always wanted to know it

B. she was going to go home

C. her teacher always wanted to know it

D. she didn't like her teacher

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