为什么有些风机要安装可调角度叶片或安装调速风机？

某地税局工作人员刘某在法制教育活动中，主动向检察人员交待了自己曾接受他人贿赂3万元行为的事实。还揭发了其单位领导多达60万元的受贿行为，并提供了有关线索，后经市检察院反贪局的侦查，查证属实，则对刘某（）。

A.应当减轻或免除处罚

B.应当从轻、减轻或免除处罚

C.可以减轻或免除处罚

D.可以从轻、减轻或免除处罚

阅读下面文章，完成问题。

　　①我们现在骑的自行车较为笨重，一般重达10千克，即便是最轻便的折叠自行车也有五六千克，不仅不利于我们携带上地铁和公交车，而且骑起来也很费劲。因此，减轻自行车的重量成为自行车设计者的一个重要任务。

　　②怎样让笨重的自行车既“减肥”又结实呢？研究人员进行多次的研究试验，终于设计出了碳纤维的网状车架。这种网状车架由碳纤维编织而成，并用高分子复合纤维制成的凯夫拉绳进行捆绑。利用这种碳纤维网状车架，研究人员制造出了只2．5千克重的轻便的网架自行车。

　　③研究人员所用的碳纤维是把普通的碳纤维涂上一种特殊的树脂，在124°C下烧制4小时而成的。工艺不复杂，但它在强度上要胜过钢、铝和钛，甚至比致密的碳合成物还坚固，它在试验中甚至可以抵挡榴弹弹片的冲击。用这种碳纤维生产出来的网架十分结实，这种网架不但可以用来制造自行车，还可以用来代替其他杆状物，如电线杆、电信高塔。

　　④网架自行车在运动过程中出现意外碰撞时，能抵挡中等强度的碰撞而不会变形。在撞击的过程中，即使有部分网格被撞坏了，整个网架照样结实好用，而且可以对损坏的网格进行修补。研究人员表示，车架的网状结构可以让碰撞的损伤局限在单个网格中，车架也不会在冲击压力下导致散架。

　　⑤目前，网架自行车还没有批量生产，因为，该车的车架成本高达6995美元，整车则要11995美元。研究人员希望能改进技术，降低成本，将来人们就可以轻松地拎着它乘坐地铁和公交车了。

1、根据文章第②段内容，你认为给自行车“减肥”的方法是________。

2、简要点评下面句子中的加粗词。

我们现在骑的自行车较为笨重，一般重达10千克，即便是最轻便的折叠自行车也有五六千克。

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3、文章第3段画线的句子“但它在强度上要胜过钢、铝和钛，甚至比致密的碳合成物还坚固……”采用了哪种说明方法？有什么作用？

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4、阅读全文，说说网架自行车的优点与缺点。

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牙槽脓肿发生的部位一般

A．牙周袋
B．坏死牙髓
C．接近龈缘
D．接近龈颊沟
E．牙龈炎

一木块的重力为30N，在10N的水平拉力作用下，10s内在水平面上沿拉力方向移动了2m．在此过程中，重力做功______J，拉力做功的功率为______W．

Confucius said, “In a group of three people, there is always something I can learn. Choose to follow the strengths of others, and use their shortcomings to reflect upon ourselves.”

As you can see from what Confucius said, everyone that we come across can teach us something useful. As long as we reflect on the lessons learnt from and by other people, we can continuously improve ourselves. But take note that when you reflect on these lessons, you apply some wisdom to each lesson because each situation is unique although they share some common principles.

We can learn a lot from everyone. We always tend to think that we can only learn from those who are higher in status or have more knowledge than us, but that is not really the case. We learn from those who are lower in status than us as well, because the experience and knowledge of each person is very different.

The best thing about this type of learning, reflecting other people’s strengths and shortcomings onto ourselves, is that we do not pay for the mistakes that are made. The only cost to us is the time that is needed to learn about and reflect on these lessons from other people’s lives.

As we all know, some mistakes can be ones which people cannot afford to make, for instance, a broken friendship or a financial loss. Thus constantly using other people’s strengths and shortcomings to reflect upon ourselves makes us realize the costs of these mistakes and reduces the possibility that we will make similar mistakes.

What can we do now to learn from others? By keeping our eyes and ears open. Be observant and able to realize what strengths and shortcomings other people have. A lot of people in this world like to complain about their lives. Listen to them and make you own assessment and from your own assessment, reflect upon your life and make improvements where necessary.

小题1:According to the passage, which of the following is NOT true?

A．Confucius thought we should learn from strengths of others.

B．Only from those who have more knowledge than us can we learn.

C．It is by reflecting on the lessons learnt by others that we can improve ourselves.

D．Reflecting upon other people’s strengths and shortcomings can help us make fewer mistakes.小题2:The underlined part “this type of learning” in the fourth paragraph probably refers to_______.

A．learning from other people’s mistakes

B．learning from others’ experiences

C．finding what strengths and shortcomings other people have

D．reflecting others’ strengths and shortcomings onto ourselves小题3:From the fifth paragraph, we learn that _______.

A．sometimes we can afford the costs of a broken friendship

B．our reflection will necessarily reduce our mistakes

C．some reflection will help to improve ourselves

D．reflection will stop us from making any mistakes in life小题4:The passage is probably taken from __________.

A．a magazine about life

B．a book about travel

C．an advertisement

D．a research report小题5:What does this passage mainly talk about?

A．How to improve oneself.

B．How to use the shortcomings of others to reflect upon ourselves.

C．How to reduce the mistakes in one’s life.

D．How to learn from other people’s strengths and shortcomings.