1999年8月17日凌晨,在土耳其发生了一场大地震,致使一万多人丧生。有关人士指

题型:选择题

问题:

1999年8月17日凌晨,在土耳其发生了一场大地震,致使一万多人丧生。有关人士指出,地震发生后缺乏必要的自救知识是使丧生人数增多的一个原因。以下是关于被埋在废墟里的人自救的一些措施,请指出正确的是  [ ]

A.大声呼救

B.静等营救人员来营救

C.用硬物敲击预制板或墙壁,向营救人员求救

D.见缝隙就钻,从废墟中爬出来

考点:声音的传播
题型:选择题

Mobile phones and the internet have improved our live in many ways. However, along with improvements, they have also brought a number of worrying problems.

Many car accident are caused by mobile phones. You can use many new mobile phones to get on the internet. This can be very convenient, but some drivers get on the internet while driving. Driving needs all our attention. By looking at their mobile phones and not at the road, these insensitive Drivers are a danger to us all.

Many of the dangers of the internet are well known. Children who visit websites without their parents’ permission sometimes talk to older people they don’t know and put themselves in great danger. People with blogs sometimes post embarrassing photographs of people they don’t know on their websites without permission. There are also people who use the internet to get personal information that we do not want them to have.

Mobile Phone and Internet Safety Tips

If you need to use a mobile phone with you drive use a “hands-free” phone.

In difficult driving situations such as rain or snow, do not use your phone at all.

Do not make very important phone calls while driving. They take your attention off the road.

Tell your children not to talk with anyone they do not know on the internet.

In an embarrassing situation, pay attention to people around you. People will be shy about taking your picture if they know you’re paying attention.

Refuse to give out any information personal information on the internet.

小题1:Which of these dangers of mobile phones or the Internet is Not mentioned in the passage?

A.You can have a car accident.

B.Someone can post your photograph on the internet.

C.Someone can get your personal information

D.Someone you do not know can call you.小题2: A “hands-free” mobile phone is probably a mobile phone that _____.

A.is free to use

B.can be used without your hands

C.can be used with only one hand

D.can be use only in ears小题3: What advice is given in the passage to stop someone from taking an embarrassing picture of you?

A.Pay attention to the people around you.

B.Don’t give out your personal information.

C.Use a “hands-free” mobile phone.

D.Wear your camera phone on you belt.小题4:Which is the best title of the passage?

A.Internet Problems

B.Mobile Phone and Internet Dangerous

C.The Development of Mobile Phone and Internet

D.The Advantages of Mobile Phone and Internet

题型:选择题

----How is Sally?

----_____________.

A.She doesn’t know

B.She is my sister

C.She is fine

D.She is in her room.

题型:选择题

建筑工地上,起重机在15s内把质量500kg的钢材匀速提升到3m高的地方,g=10N/kg.求:

(1)起重机对钢材做的功是多少?

(2)起重机对钢材做功的功率是多少?

(3)如果起重机的机械效率是60%,起重机的电动机做了多少功?

题型:选择题

下列()不属于交换子系统

A.HLR

B.MSC

C.BSC

D.VLR

题型:选择题

Adobe photoshop 5.0软件中最多可建()层Alple通道。

A、10

B、20

C、50

D、若干

更多题库