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Caribbean Islands
What would you see if you took a cruise to the Caribbean Islands？ Palm trees and coconuts （椰子）？ white beaches and clear， blue ocean？ Colorful corals （珊瑚） and even more colorful fishes and birds？ You bet. There are thousands of islands in the Caribbean Sea. They are famous for their warm，tropical climate and great natural beauty.
The Caribbean Islands form. a chain that separates the Caribbean Sea from the rest of the Atlantic Ocean.____46____ Many of the islands were formed by the eruption （爆发） of ancient volcanoes （火山）. Others are low-lying coral islands that gradually rose from the ocean.
The Caribbean Islands are known by several names.____47____ The explorer Christopher Columbus called the islands the Indies in 1492， because he thought he was near the coast of India.
Later， Spain and France called the islands the Antilles.
There are four large islands in the Caribbean Sea.____48____ These four islands are often called the Greater Antilles. Together， they account for about 90 percent of the land area of the Caribbean Islands.
The rest of the Caribbean Islands are much smaller.____49____ You can see why pirates such as the famous Blackbeard sailed these waters. There are countless small islands to bury treasure or hide on.
The weather of the Caribbean Sea is almost always warm and sunny. Sandy beaches line the coasts of many islands.____50____ Many tourists arrive on cruiseships.
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Which is NOT true of sparklers？ 查看材料
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Calfing for Safe Celebrations
Last Fourth of July, Pete, a 14-year-old boy, was enjoying the lit-up skies and loud booms from the fireworks (烟花) being set off in his neighborhood. Suddenly, the evening took a terrible turn. A bottle rocket shot into his eye, immediately causing him terrible pain. His family rushed him to the emergency room for treatment. As a result of the injury, Pete developed glaucoma (青光眼) and cataracts (白内障). Today, Pete has permanent vision loss in his injured eye because of his bottle rocket injury.
June is Fireworks Eye Safety Awareness Month, and through its EyeSmart campaign, the American Academy of Ophthalmology (眼科学) wants to remind consumers to leave fireworks to professionals (专业人员). "There is nothing worse than a Fourth of July celebration ruined by someone being hit in the eye with a bottle rocket," said Dr John C. Hagan, clinical correspondent for the Academy and an ophthalmologist at Discover Vision Centers in Kansas City. "A safe celebration means letting trained professionals handle fireworks while you enjoy the show."
According to the U.S. Consumer Product Safety Commission, more than 9,000 fireworks-related injuries happen each year. Of these, nearly-half are head-related injuries, with nearly 30 percent of these injuries to the eye. One-fourth of fireworks eye injuries result in permanent vision loss or blindness. Children are the most common victims of firework abuse (伤害), with those fifteen years old or younger accounting for 50 percent of fireworks eye injuries in the United States. Dr Hagan estimates that his practice sees more than 30 injuries each year from fireworks.
Even fireworks that many people consider safe represent a threat to the eyes. For children under the age of five, apparently harmless sparklers (花炮) account for one-third of all fireworks injuries. Sparklers can bum at nearly 2,000 degrees Fahrenheit (华氏).
What happened to Pete last Fourth of July？ 查看材料
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Diabetes (糖尿病) and Eye Damage
Over 2 million Canadians have diabetes. It is the leading cause of blindness in North Americans under 65 years of age. Diabetes is a condition where the body either cannot produce enough insulin (胰岛素) or cannot respond properly to insulin. Insulin is important because it moves glucose (葡萄糖), a simple sugar, into the body&39;s cells from the blood. The food people eat provides the body with glucose, which is used by the cells as a source of energy. If insulin isn&39;t available or doesn&39;t work correctly to move glucose from the blood into the cells, glucose will stay in the blood, leading to high blood sugar levels.
High blood sugar levels damage the blood vessels, including the tiny blood vessels in the eye. This leads to an eye disease known as diabetic retinopathy (糖尿病型视网膜病). The retina (视网膜) is an area at the back of the eye that changes light into nerve signals, With diabetic retinopathy, some blood vessels in the retina are lost, and some of the other blood vessels begin to "leak" blood. This causes the retina to swell and gradually cuts off its supply of oxygen and nutrients (滋养物). Eventually, the retina starts to grow new blood vessels to replace the damaged ones. Unfortunately, these new vessels are not as strong as the old ones. They are more likely to break, causing bleeding in the eye.
At first, people with diabetic retinopathy will not notice any symptoms. As the disease gets worse, they may notice blurred (模糊的) vision, black spots or flashing lights. As time goes on, it can progress to blindness.
Everyone with diabetes is at risk for diabetic retinopathy, andthe risk increases the longer you&39;ve had diabetes.
Fortunately, you can reduce your risk if you do not have diabetes, but think you may be at risk for this condition. Visit your doctor to be screened for diabetes. If you do have diabetes: have frequent eye check-ups.
Make sure that you monitor your blood sugar frequently and use your medications as
recommended by your doctor. There is evidence to show that keeping your blood sugar under tight control can slow down eye damage. If you have high blood pressure, follow your recommended diet and medications to keep it under control. If you are not sure whether you have high blood pressure, or whether your blood pressure is under control, discuss this with your doctor.
Glucose cannot be turned into energy in the body__________. 查看材料
Which of the following is not a landmark？ 查看材料
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