问题
单项选择题
某地一项有关高血压的横断面研究结果表明：男性40～49岁组有高血压者占12%，女性占11%。从而得出结论，该年龄组男性患高血压的危险性较女性大。此结论
A．正确
B．不正确，因为没有区分患病率和发病率
C．不正确，因为未用率做性别间比较
D．不正确，因为无对照
E．不正确，因为没有考虑到可能存在的队列的影响
答案
参考答案：C
搜题请搜索小程序“爱下问搜题”
某地一项有关高血压的横断面研究结果表明：男性40～49岁组有高血压者占12%，女性占11%。从而得出结论，该年龄组男性患高血压的危险性较女性大。此结论
A．正确
B．不正确，因为没有区分患病率和发病率
C．不正确，因为未用率做性别间比较
D．不正确，因为无对照
E．不正确，因为没有考虑到可能存在的队列的影响
参考答案：C
What do you usually do at the weekend? Some people like to at home. But others like to go a walk or play football. My friend Jack works hard in a factory on weekdays. At the weekend, he always the same thing. On Saturday he his car and on he goes with his family to a village by car. His uncle and aunt have a farm there. It isn’t a one, but there’s always work to do on a farm. In , the harvest(收获) season, the children help them pick oranges. They also help with the animals and give them their . Jack and his wife help in the fields. At the end of the day, they are all and Jack’s aunt gives them a big meal.
|