发动机转子上的联轴器是连接()的组合件.A.燃烧室与涡轮 B.压气机与燃烧室 C.涡

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问题:

发动机转子上的联轴器是连接()的组合件.

A.燃烧室与涡轮

B.压气机与燃烧室

C.涡轮转子与压气机转子

D.涡轮与附件齿轮箱

考点:民用航空器维修执照考试M14燃气涡轮发动机M14燃气涡轮发动机题库
题型:单项选择题

对于反应4A(s)+2B(g)⇌3C(g),下列说法正确的是(  )

A.体积不变充入惰性气体,反应速率增大

B.其他条件不变,降低温度,反应速率减慢

C.其他条件不变时,增大压强,活化分子百分数增大,化学反应速率加快

D.若增加或减少A物质的量,反应速率一定会发生明显的变化

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下列分子中所有原子都满足最外层8电子结构的是(     )

A.二氟化氙

B.三氯化磷

C.六氟化硫

D.三氟化硼

题型:单项选择题

C

Of all the websites,one that has attracted attention recently is myspace.com.Most of this attention has come from the media and tells every reason why the website should be shut down.The threat of internet predators(窃掠者)is indeed a tough reality,but shutting down the site is not the answer.If myspace.com were shut down,another site would quickly take its place.Therefore,the right way is to teach teens how to use the site safely and educate them about who may be predators and how to avoid them.

The key to staying safe on the Internet is to make sure that your profile(个人资料)is secure.The simplest way is to change the privacy setting on your profile to “private”, which protects your information so that only the people on your friend list can view it.Although this is effective,it is not perfect.Predators can find ways to view your profile if they really want to,whether through hacking in or figuring out their way onto your friend list.Thus,you should never post too much personal information.Some people actually post their home and school addresses,date of birth,and other personal information, often letting predators know exactly where they will be and when.The most information that is safe is your first name and province.Anything more is basically inviting a predator into your life.

Another big issue is photos. I suggest completely skipping photos and never posting a photo of a friend online without asking permission.

Most importantly, never,under any circumstances,agree to a real-life meeting with anyone you meet online.No matter how well you think you know this person, there are no guarantees that they have told the truth.But you could feel free to chat with people you meet on the site, but just remember that not everyone is who they say they are.Hopefully,the next time you edit your profile,you’ll be more informed about the dangers of internet predators and take the steps to defend yourself.

50.Kids can avoid web predators successfully by_________.

A.attracting more public attention

B.shutting down the website “myspace . com”

C.showing the kids ways to try other sites

D.recognizing and getting away from them

51.The safest basic personal information that you can share online is_________.

A.your home address and birthday    B.school address and your first name

C.your first name and province       D.your province and cell phone number

52.We can learn from the passage that_____.

A.not everybody you meet on line is honest and reliable

B.it is not acceptable to post a photo of a friend on line

C.it is not safe by chatting with grown-ups on the website

D.only you and your friends can view your personal profile

53.What could be the best title of this passage?

A.Personal Safety                B.Web Safety for teens

C.Web Hackers in the past        D.Predators’ Tricks

题型:单项选择题

邓 * * 指出:“一个党、一个国家、一个民族,如果一切从本本出发,思想僵化,迷信盛行,那它就不能有前进,它的生机就停止了,就要亡党亡国。”这段话,非常深刻地阐明了( )。

A.反对教条主义的重要性

B.改革开放的重要性

C.破除封建迷信的重要性

D.解放思想的重要性

题型:单项选择题

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