امنیت اینترنت

Science Education

Internet Safety

Twenty _________hoursdaysweeksyears ago, kids in school had never even heard of the internet. Now, I'll bet you can't find a single person in your school who hasn't at least heard of it. In fact, many of us use it on a regular basis and even have access to it from our homes! The 'net' in _________internetfishnetnetworknetting really stands for network. A _________computerinternetnetworkwire is two or more computers connected together so that information can be _________hiddenlostcreatedshared, or sent from one computer to another. The internet is a vast resource for all types of information. You may enjoy using it to do research for a school project, downloading your favorite songs or communicating with friends and family. Information is accessed through web pages that companies, organizations and individuals create and post. It's kind of like a giant bulletin board that the whole world uses! But since anyone can put anything on the internet, you also have to be careful and use your best judgement and a little common sense.

Just because you read something on a piece of paper someone sticks on a bulletin board doesn't mean it's good information, or even correct, for that matter. So you have to be sure that whoever posted the _________internetbulletin boardinformationstamp knows what they're talking about, especially if you're doing _________researchlunchrecesssports! But what if you're just emailing people? You still have to be very careful. If you've never met the person that you're communicating with online, you could be on dangerous ground! You should never give out any personal information to someone you don't know, not even your name! And just like you can't _________readfindunderstandbelieve the information on every website out there, you can't rely on what strangers you 'meet' on the internet tell you either. Just like you could make up things about yourself to tell someone, someone else could do the same to you!

نتایج آزمون نماز شناسی

www.yazdedu.ir

نكات گرامري درس 7 زبان پيش دانشگاهي

نكات گرامري درس 7 زبان پيش دانشگاهي

although & though

 

در اغلب موارد تفاوتي بين اين دو كلمه وجود ندارد و ميتوان به طور يكسان از آنها استفاده كرد.

 

Although ( = though ) she smokes 40 cigarettes a day, she is quite fit.                                                                                                  ( اگر چه روزي 40 سيگار ميكشد، كاملا سالم است. )

 

I’d quite like to go out, (al)though it is a bit late.

( اگرچه راه كمي دور است، علاقه زيادي به بيرون رفتن دارم. )

 

(Al)though the traffic was bad, I arrived on time.

( گرچه رفت و آمد زياد بود، به موقع رسيدم. )

 

I didn't get the job (al)though I had all the necessary qualifications.

( اگر چه همه شرايط لازم را داشتم، شغل را بدست نياوردم. )

 

براي تاكيد ميتوان قبل از ( though ) از ( even ) استفاده كرد. ( even although ) نادرست است.

 

Even though I didn't understand the word, I kept smiling.

( اگر چه يك كلمه نفهميدم، به لبخند ادامه دادم. )

 

I couldn't sleep even though I was really tired.

( اگر چه واقعا خسته بودم نتوانستم بخوابم. )

 

از ( though ) ( نه although ) ميتوان در پايان جمله استفاده كرد كه در اين صورت به معني ( however ) ميباشد.

 

It was a quiet party. I had a good time, though.

( مهماني آرامي بود اما لذت بردم. )

 

I see him every day.I've never spoken to him though.

( او را هر روز ميبينم ولي هرگز با او صحبت نكرده ام. )

 

براي وصل كردن دو جمله به يكديگر، يك كلمه ربط كافي است.هر دو جمله زير صحيح و هم معني هستند.

 

Although she was tired, she went to work.= She was tired but she went to work.

 

جمله زير نادرست است:

Although she was tired but she went to work.

http://mousavi51.blogfa.com/cat-13.aspx

شعر

The caravan of life shall always pass
Beware that is fresh as sweet young grass
Let's not worry about what tomorrow will amass
Fill my cup again, this night will pass, alas.

این قــــافله عــمر عجــــــب م‍ی‌گذرد

دریـــــاب دمی كه با طـــرب می‌گذرد

ساقــی غم فردای حریفان چه خوری

پیش آر پیــاله را كه شــــب می‌گذرد

زبان پیش دانشگاهی - دروس 5 و 6

http://englishnews.blogfa.com

بارها و الکتریسیته

Charges and Electricity

Atoms, the basic building blocks of matter, are made of three basic components: protons, neutrons and electrons. The protons and neutrons cluster together to form the nucleus, the central part of the atom, and the _________neutronsprotonselectronsquarks orbit about the nucleus. Protons and electrons both carry an electrical charge. The charges they carry are opposite to each other; protons carry a _________negativepositiveneutralstrong electrical charge while electrons carry a negative electrical charge. Neutrons are _________negativelypositivelyneutrallystrongly charged - they carry no charge at all.

Electricity is the movement of charged particles, usually electrons, from one place to another. Materials that electricity can move through easily are called conductors. Most metals, such as iron, copper and _________woodpapernitrogenaluminum, are good _________keepersprotectorsinsulatorsconductors of electricity. Other materials, such as rubber, wood and glass, block the flow of electricity. Materials which _________allowcreatehelpprevent the flow of electricity are called insulators. Electrical cords are usually made with both conductors and _________conductorsinsulatorsmetalsplugs. Electricity flows through a _________conductorinsulatorneutroncord in the center of the cord. A layer of insulation _________surroundswarmslooks athears the conductor and _________speeds upreplacespreventsallows the electricity from 'leaking' out.

Objects usually have equal numbers of positive and negative charges, but it isn't too hard to temporarily create an imbalance. One way scientists can create an imbalance is with a machine called a _________Rube GoldbergVan de GraaffBig BadEinstein generator. It creates a large static charge by placing electrons on a metal dome using a motor and a big rubber band. Since like charges _________jumpjoinrepelattract, the electrons push away from each other as they collect on the dome. Eventually, too many electrons are placed on the dome and they leap off, creating a spark that looks like a bolt of lightning.

Have you ever received a _________dollarbookshockcat after having walked across a carpet? This shock was caused by extra electrons you collected while walking across the carpet. Your body became like the dome of the Van de Graaff generator, full of extra electrons looking for a way to get away. The path back to the carpet was blocked by the _________freckleshirtpantsshoes you were wearing, but they were able to move through your hand and into the object that you touched, causing the shock. So, the next time you shuffle across a carpet and shock your friend on the ear, tell them you were just trying to be a Van de Graaff generator!

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