问题
多项选择题
继发性高血压，发病机制中哪些正确（）
A.慢性肾小球肾炎所致的高血压主要与水钠潴留及血容量增加有关
B.肾血管性高血压在继发性高血压中属不常见的一种
C.原发性醛固酮增多症仅少数病例可发展为重度或恶性高血压
D.嗜铬细胞瘤在继发性高血压中是较少的一种
E.对40岁以上的高血压者应着重考虑继发性高血压的可能
答案
参考答案：A, B, C
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继发性高血压，发病机制中哪些正确（）
A.慢性肾小球肾炎所致的高血压主要与水钠潴留及血容量增加有关
B.肾血管性高血压在继发性高血压中属不常见的一种
C.原发性醛固酮增多症仅少数病例可发展为重度或恶性高血压
D.嗜铬细胞瘤在继发性高血压中是较少的一种
E.对40岁以上的高血压者应着重考虑继发性高血压的可能
参考答案：A, B, C
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| Your friends might be in Australia or maybe just down the road , but they are all just a few clicks (点击)away. Life has 1 for millions of teenagers across the world who now make friends online. 2 you use chat rooms, QQ, MSN or ICQ, you are 3 of a virtual community(虚拟社区). "I rarely talk with my parents or grandparents, 4 I talk a lot with my old friends on QQ," said Fox's Shadow, the online nickname(网名)used by a Senior 2 girl in China. "Eighty per cent of my classmates use QQ  5 school."QQ is the biggest messaging 6 in China. A record 4 million people used it on Saturday nights in October, 7 to Tencent, the company which developed QQ. And Fox's Shadow might well have been one of them. "I log in (登陆) on Friday nights, and Saturdays or Sundays when I feel 8 . I usually 9 about 10 hours chatting online every week,"she said. "But I rarely talk with 10 , especially boys or men." Even though she likes chatting, she is careful about making 11 with strangers online. "You don't know 12 you're talking to. You should 13 be careful about who you trust online." Many people would like to meet offline when they feel they have got to 14 someone very well. Fox's Shadow once met one of her on  line friends face to face. It was a girl who was a comic fan like 15 and they went to a comic show together.However, not all teenagers have been so 16 . At the beginning of this year, a 17-year-old girl was killed after meeting a friend she had found on QQ. The criminals weren't 17 until last month. A 16-year-old Beijing boy, known online as Bart Simon, dislikes QQ users. "I used to chat on QQ, but I found that most people were talking 18 ," he said. Now he chats online in English, using MSN. But he spends little time chatting as he sees it as a 19 of time and money. "If you are really 20 to it, sometimes you just can't cocentrate in class," he said. | ||||
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