CNN News:超級(jí)臺(tái)風(fēng)海燕登陸菲律賓 聯(lián)合國(guó)啟動(dòng)緊急救援

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Hi. I'm Carl Azuz.

And this is your Friday edition of CNN STUDENTNEWS.

Most of you watching this are probably in school,most students in the Philippines are not.

Yesterday, there was a storm bearing down on the country, and it was a monster.

Possibly, one of the strongest ever.

Typhoon Haiyan.

The Philippines is an archipelago, a group of islands.

More than 7,000 of them.

This storm is so big its clouds are effecting two thirds of the country.

A typhoon is the same kind of storm asa hurricane.

On Thursday, Haiyan was as strong as the category five hurricane.

It was still that strong when it made landfall today.

Before it hit, Andrew Stevens was reporting on what the Philippines was expecting and how itwas preparing.

We're expecting dusts of up to 300 kilometers an hour.

That's almost 200 miles an hour, plus a big storm surge and heavy, heavy rain.

Authorities have been taking measures to get people to safer ground, not only the low linecoastal areas, but also in the hills, where there is a danger of landslides.

Is this legit?

An IPO is the first time a company sells its stock to the public.

It's true. IPO stands for Initial Public Offering, specifically offering shares of a company stocks.

A popular social media service launched its IPO this week.

Twitter, and the initial offer went pretty well.

On Thursday, more than 113 million shares of Twitter were bought or sold on the stockmarket.

The stock's price at the end of the day puts the company's value at around $24 billion.

Now, Twitter has to show potential buyers that it's worth than investment.

I'm going to make history here as the first president to live tweet.

This movement that was started on Facebook and Twitter that then took on the life of its own.

People that I work with, do not shut up about Twitter.

It's the most high tech IPO since Facebook.

Twitter began trading here at the New York Stock Exchange instead of the NASDAQ afterFacebook's famous there.

The messy debut plagued by technical difficulties.

But today, call it an about face as Mark Zuckerberg and friends celebrate shares near recordhighs,

but Twitter's financials aren't as strong:

the company is losing money, unlike Facebook which was already earning a billion dollars a yearwhen it went public.

Facebook also had 900 million users.

Twitter has far fewer.

How do they get to half a billion?

How do they get to a billion?

And I think ultimately, we're believers in that story, but I think that's going to be the biggestchallenge.

A challenge Twitter insists it can overcome.

We've seen tremendous organic growth in our users, particularly internationally.

And when it comes to social media, it pays to be popular.

Advertising always flows to where eyeballs go.

So far, advertisers are flowing in and are buying mobile ads.

That's the Holy Grail.

Twitter gets 70 percent of its total ad revenue from mobile.

Facebook, only three percent when it went public.

But can Twitter keep the momentum going?

Twitter has to prove the value of the platform, because if they are going to ask people to comeand spend money on the site, they are going to ask company should and buy ads on Twitter.

Then need to show that that is money well spent.

Some are optimistic that there is big money to be made, 140 characters at a time.

We don't think it's actually a questions of will they make money, it isn't if-or when they makemoney question.

Next up today, partially hydrogenated oils.

Now, you might not know exactly what those are, but chances are, you've eaten them.

There are major source of transfats or transfatty acids.

They are used to increase flavor in some foods or help the foods last longer.

But the Food and Drug Administration, the FDA says those partially hydrogenated oils are nolonger recognized as safe.