我国是一个缺水国家,人均水资源不足世界平均水平的1/4,缺水已经成为( )我国城市

题型:单项选择题

问题:

我国是一个缺水国家,人均水资源不足世界平均水平的1/4,缺水已经成为( )我国城市经济社会发展的一个瓶颈因素。

A.制约
B.限制
C.约束
D.阻碍

考点:地方公务员行政职业能力测试广东省公务员考试行政职业能力测试真题2009年
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(10分)如图所示,水平放置的两块长直平行金属板a、b相距d=0.10m,a、b间的电场强度为E=5.0×105N/C,b板下方整个空间存在着磁感应强度大小为B=6.0T、方向垂直纸面向里的匀强磁场.今有一质量为m=4.8×10-25kg、电荷量为q=1.6×10-18C的带正电的粒子(不计重力),从贴近a板的左端以v0 =1.0×106m/s的初速度水平射入匀强电场,刚好从狭缝P处穿过b板而垂直进入匀强磁场,最后粒子回到b板的Q处(图中未画出).求:

(1)粒子从狭缝P处穿过b板进入匀强磁场的速度大小和方向θ.

(2)P、Q之间的距离L.

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民事法律行为是公民或法人设立、变更、终止民事权利民事义务的( )行为。

A.合法

B.违法

C.可撤销

D.可变更

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阅读理解。

     It is common and usual to see people freak out when they face challenges in their life. We all

pass in different life problems and challenges. No one is free of life problems. Only a dead man

faces no problem. As long as you are alive, challenges are everywhere.

     How do you face problems and challenges in your life? Problems and challenges are the building

blocks of your personality. They make you who you are. Besides, whether what happened in your

life builds or destructs you depends on how you look at it. If you take your problems as troubles,

they will be troubles and may cause destruction. If you take them as constructive tools, you are going

to be built up on them.

     Problems are everywhere. No one can avoid them. And they are good too. They open up a

different look and opportunity if you are willing to see. When you face troubles, do not frustrate or

freak out. Just cool yourself to think in a different direction. Think in a positive way. Every problem

has its own good as well as bad sides. Focus on the good one. Look at the bright side.

     Besides, there is always a good person, perhaps your mom or dad, or one of your friends, right

beside you who can turn everything into your best if you are willing to turn to them. No matter what

happens, they will be there to help you. Trust them and they will never let you down. All you need

to know is that you are loved wherever you are.

1. What's the meaning of the underlined phrase "freak out" in Paragraph 1?

A. Feel shy.    

B. Stay calm.  

C. Keep up.    

D. Feel upset.

2. In Paragraph 2, the writer implies that ______.

A. problems cause troubles  

B. attitude is everything

C. challenges can be avoided  

D. personalities are built on failures

3. According to the last paragraph, when we're in trouble, we ______.

A. can only depend on our parents      

B. are not alone

C. should only believe ourselves        

D. are not confident

4. What's the writer's purpose to write the passage?

A. To encourage.  

B. To compare.  

C. To prove.

D. To explain

题型:单项选择题

以下关于煤的灰分叙述正确的为( )。

A.是三个矿物质来源中的原生矿物质,可方便地采用重力洗选法去除
B.就是煤中矿物质总量
C.在炼焦用煤质量控制时一般不大于20%
D.对煤作为能源或是作为原料来说,一般都是不利的

题型:单项选择题

禁用于心功能不全患者的躁狂症的药物是

A.氟哌利多
B.舒必利
C.氟哌噻吨
D.氯氮平
E.五氟利多

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