如图所示,正方形截面对x轴的惯性矩为()。 A.A B.B C.C D.D

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问题:

如图所示,正方形截面对x轴的惯性矩为()。

A.A

B.B

C.C

D.D

考点:注册环保工程师环保工程(材料力学)环保工程(材料力学)题库
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根据短文判断下面这些话是谁说的,在括号填上相应字母。

                                                        What Do You Think?  

     A. Mrs. Wang

     70, does not work

     It will be difficult to move in Beijing when the Olympic Games come. The games are very popular and

the streets will be full of people and cars. I think I'm too old for it. I will watch the games on television at

home. I love watching the swimming-and when the sports people start running fast, it is very exciting.

    B. Grace Chen

    12, schoolgirl

     My family is going to get early tickets for some of the sports. Dad loves cycling. Maybe we will watch

that. I love all sports. I will be happy to see anything. I hope I can see some popular sports players. I will

take their photographs and shout loudly for them.

     C. Mr. Lin

     40, taxi driver 

     When the Olympic Games come to Beijing, I will be very busy! I am learning more English, so I will be

able to help foreigners in the city.

     D. Sally Ma

     17, gymnast

     My dream is to be on China's national team. I practise from early until late every day. It is very tiring.

China is very good at gymnastics, so we hope we can win gold.  It won't be easy, but we can do it.

( )1."Let's eat late. I'm watching the table tennis."       

( )2."Yes,I know that hotel. I'll take you there now."      

( )3."There's Yao Ming. Let me take a photograph."          

( )4."It will be slow because the roads are very busy today."

( )5."Have you got a ticket for me too?"                    

( )6."These young people are so strong!"                    

( )7."I'm on the team! I'm very excited today!"             

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财政部、国家税务总局、住房和城乡建设部有关负责人就房产税改革试点表示,条件成熟时,在全国范围内对个人拥有的住房征收房产税。征收房产税(  )

①能够调节我国个人收入分配        

②能抑制房价过快上涨 

③是我国运用经济手段防止房地产过热 

④是为了通过增加税收来大幅度增加国家财政收入

A.①②

B.①③

C.②③

D.③④

题型:单项选择题

动力仪所测示功图的x轴代表光杆的冲程,y轴代表()。

A、注入压力

B、注水量

C、光杆负荷

D、光杆长度

题型:单项选择题

空气位操纵时,下列哪项准备工作是错误的()。

A、将非操纵端的调压阀调至定压

B、将转换扳钮移至空气位

C、将转换阀153转换至空气位

D、将大闸手柄放在运转位

题型:单项选择题

冠字号码查询检查方法分为()。

A.正查法

B.倒查法

C.全面检查法

D.抽样检查法

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