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我国《宪法》规定：“中华人民共和国是工人阶级领导的、以工农联盟为基础的人民民主专政的社会主义国家。”这表明了我国的（）。
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For years pediaticians didn’t worry much about treating hypertension in their patients. After all, kids grow so fast, it’s hard keeping up with their shoe size, let alone their blood pressure. Sure, hypertension in adults places them at greater risk of heart attack and stroke. But nobody likes the idea of starting youngsters on blood-pressure medicine they could wind up taking the rest of their lives. Who knows what previously unheard-of side effects could crop up after five pr six decades of daily use The rationale has been: kids grow out of so many things, maybe they’ll grow out of this too. Now, though, comes word that high blood pressure can be destructive even in childhood. According to a recent report in the journal Circulation, 19 of 130 children with high blood pressure developed a dangerous thickening of the heart muscle that, in adults at least, has been linked to heart failure. "No one knows if this pattern holds true for younger patients as well," says Dr. Stephen Daniels, a pediatric cardiologist who led the study at Children’s Hospital Medical Center in Cincinnati, Ohio. "But it’s worrisome. " Who’s most at risk Boys more than girls, especially boys who are overweight. Their heart works so hard to force blood through extra layers of fat that its walls grow more dense. Then, after decades of straining, it grows too big to pump blood very well. Fortunately the abnormal, thickening can be spotted by ultrasound. And in most case, getting that blood pressure under control—through weight loss and exercise or, as a last resort, drug treatment—allows the overworked muscle to shrink to normal size. How can you tell if yours are like the 670,000 American children ages 10 to 18 with high blood pressure It’s not the sort of thing you can catch by putting your child’s arm in a cuff at the free monitoring station in your local grocery. You should have a test done by a doctor, who will consult special tables that indicate me normal range of blood pressure for a particular child’s age, height and sex. If the doctor finds an abnormal result he will repeat the test over a period of months to make sure the reading isn’t a fake. He’ll also check, whether other conditions, like kidney disease, could be the source of the trouble. Because hypertension can be hard to detect the National Heart, Lung and Blood Institute recommends annual blood-pressure checks for every child over age 3. About ha! the cases of hypertension stem directly from kids being overweight. And the problem is likely to grow. Over the past 30 years the proportion of children in the U. S. who are overweight has doubled, from 5% to 11 to or 4.7 million kids. You can keep your children from joining their ranks by clearing the junk food from your pantry and hooking you kids—the earlier the better—on healthy, attractive snacks like fruits(try freezing grapes or carrot sticks with salsa). Not only will they lower your children’s blood pressure: these foods will also boost their immune system and unclog their plumbing. Meanwhile, make sure your kids spend more time on the playground than with their Play-Station. Even if they don’t shed a pound, vigorous exercise will help keep their blood vessels nice and wide, lowering their blood pressure. And of course, they’ll be more likely to eat light and exercise if you set a good example. The word "unclog" in the last paragraph can be replaced by ______.
但丁说：“道德常常能填补智慧的缺陷，而智慧却不能同样填补道德的缺陷。”这说明（）。
C Federal regulators Wednesday approved a plan to create a nationwide emergence alert (警报) system using text messages delivered to cell phones. Text messages have exploded in popularity in recent years, particularly among young people. The wireless industry’s trade association, CTIA, estimates (估计) more than 48 billion text messages are sent each month. The plan comes from the Warning Alert and Response Network Act, a 2006 federal law that requires improvements to the nation’s emergency alert system. The act tasked the Federal Communications Commission (FCC. with coming up with new ways to alert the public about emergencies. "The ability to deliver accurate and timely warnings and alerts through cell phones and other mobile services is an important next step in our efforts to help ensure that the American public has the information they need to take action to protect themselves and their families before, and during, disasters and other emergencies," FCC Chairman Kevin Martin said following approval of the plan. Participation in the alert system by carriers—telecommunications companies is voluntary, but it has received solid support from the wireless industry. The program would be optional for cell phone users. They also may not be charged for receiving alerts. There would be three different types of messages, according to the rules. The first would be a national alert from the president, likely involving a terrorist attack or natural disaster. The second would involve "approaching threats," which could include natural disasters like hurricanes or storms or even university shootings. The third would be reserved for child abduction (绑架) emergencies, or so-called Amber Alerts. The service could be in place by 2010. Which of the following is TRUE of cell phone users according to this passage
以下关于民族区域自治权表述正确的是（）。
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