The global population of frogs has declined in recent years while the amount of ultraviolet radiation reaching the Earth has increased. Since the genetic material in frog eggs is harmed when exposed to ultraviolet radiation, and since the eggs themselves are not protected by shells or leathery coverings but are gelatinous, the frog population decline is probably due, at least in part, to the ultraviolet radiation increase.
Which of the following, if true, provides the strongest support for the argument？
Even in those regions where there has been no significant increase in ultraviolet radiation, only a small proportion of the frog eggs that are laid ever hatch.
In areas where there has been the least decline in frog populations, populations of species of insects that frogs eat have decreased.
The eggs of frog species whose populations are declining tend to have higher concentrations of damaging pesticides than do the eggs of frog species whose populations have not declined.
In many places where turtles, which lay eggswith tough, leathery coverings, share habitats with frogs, turtle populations are also in decline.
Populations of frog species that hide their eggs beneath rocks or under sand have declined considerably less than have populations of frog species that do not cover their eggs.
Skype is a computer program allowing telephone conversations via the Internet. Calls to other Skype users are free as well as calls to regular telephone and mobile telephone numbers all over the world are at a low rate.
As a state-of-the-art peer-to-peer (P2P) communication tool, Skype’s code and protocol remain closed and proprietary, but potential users can download it for free from the official site. Additionally, with the SkypeOut service, customers can buy credit to place computer-to-telephone calls. Or, with SkypeIn, they can buy a regular telephone number from partners to receive calls from mobile and fixed-line telephones.
Skype is a great application for broadband connections. It is quick and easy to get started with. Download, register, install, plug in your headset, speakers or USB phone and start calling your friends. The calls have excellent sound quality and are highly secure with end-to-end encryption. You do not even need to configure your firewall or router or any other networking gear.
Searching for those long-lost relatives or just somebody to have a quick chat with is also part of what Skype is all about with a Global User Directory. It is a giant phonebook of all the people who use Skype. You can use it to search for people you would like to talk to, people who have the same birthday or people who just happen to live in the same street as you.
When you find somebody you know or even someone you would like to know, you add them to your list of contacts. You can also write a little note to let them know who you are and why you want to add them to your list. When people are on your list, you can see if they are online, offline, busy… or perhaps out to lunch.
You can also send instant messages with Skype. That is nice for when you are talking about a website and you want to send that really long address or if you are writing a song maybe. Either way, you can send one of those little smiley faces along with your message.
Tom Online, a major Chinese entertainment portal, and Luxembourg-based instant messaging (IM) service provider Skype released their co-branded IM software Tom-Skype on October 25, 2004. Tom-Skype, the computer-to-computer service, offers peer-to-peer text and voice communications. Advertisements for Skype appeared throughout the Shanghai subway system and around town. Tom-Skype was China’s first IM software company allowed to develop an Internet phone business. Tencent’s QQ, Netease’s POPO and 263 Group are also looking at entering the market.
Internet phone or Voice over IP (VoIP) services are currently offered by a wide range of companies and have been very successful due to the low price of the service. These services have, however, been somewhat of a controversial issue in China. The issue has surrounded whether or not these services should be classified as a basic telecom service or as a value-added telecom service. Right now, basic telecom services can only be offered by telecom operators.
In "quick-response" manufacturing, the manufacturer receives electronic feedback directly from retailers about which models, patterns, or styles are selling, and in what quantities. This feedback triggers the manufacture of further batches to replenish stocks of articles that have been sold. The advantage for retailers is that they are freshly stocked with just those articles are most likely to sell.
For quick-response manufacturing to work to the retailer’s advantage in the respect mentioned above, which of the following must be true?
The cost per piece or manufacturing various articles in small batches exceeds the cost per piece of manufacturing large quantities of those articles.
The equipment necessary to provide the direct feedback is different from the equipment that supports conventional inventory control.
Consumers do not patronize a store that does not stock the model, pattern, or style that they prefer.
Consumers can distinguish retailers that rely on quick response manufacturing from retailers that do not.
Consumers do not suddenly stop buying models, patterns, or styles that have just become popular.
* 期末考试比较紧张 所以只翻译了一道GRE逻辑 点击括号内空格可以看到答案