| Nature has devised many ways to protect
creatures’ eyes. The most common protection is the eyelid--a fold of skin that
closes over the eye, protecting it from damage. Eyelashes are useful for keeping
out dust and other irritants, and tears wash away any particles that get through
the other defenses. Some creatures, including most birds, have three eyelids. The upper and lower lids act like human lids and keep out twigs, dirt and sand. The third eyelid, however, is a semitransparent tissue that crosses over the eye from the inside corner to the outside corner. Because of this protective membrane, birds seldom have to blink. They close their eyes only when they go to sleep. In ducks, this third eyelid self as an underwater diving mask that helps the ducks find food. Most fish and snakes have no eyelids at all. Instead, a har A. to keep windblown sand out of its eyes B. that get in the way of its sight C. to help it see better D. to attract other camels [单项选择]
Facebook Changes Privacy Policy Facebook has agreed to make worldwide changes to its privacy policy as a result of negotiations with Canada’s privacy commissioner. Last month the social network was found to breach Canadian law by holding on to users’ personal data indefinitely. Facebook has now agreed to make changes to the way it handles this information and be more transparent about what data it collects and why. It will also make it clear that users carl deactivate or delete their account. As well as updating the privacy policy, Facebook has said it will make changes that will give users more control over the data they provide to third-party developers of applications, such as games and quizzes. There are around 950,000 developers in 180 countries that provide applications for the site. Specifically, the changes will require applications to state which information they wish to access and obtain consent from the user befo A. To change the way it handles this information. B. To be more transparent about what data it collects and why. C. To set up password system. D. To make it clear that users can release or delete their account. [单项选择]
The year 2000 will bring big changes in communication. Cell phones will be small enough to carry in your pocket. Videophones will let you see the person you are talking to on the phone. Tiny hand size computers will know your favorite subjects. The Internet and email will be everywhere. 我来回答: 提交
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