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张三，每周至少有一天达到30分钟的中等强度体力活动，但活动不规律，没有达到推荐的合理运动量。请问若用阶段变化模式来评价其所处的行为变化阶段是
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The professor talked to American and Brazilian students about lateness in both an informal and a formal situation: lunch with a friend and in a university class, respectively. He gave them an example and asked them how they would (1) if they had a lunch appointment with a friend, the average American student (2) lateness as 19 minutes after the (3) time. On the other hand, the average Brazilian student felt the friend was late after 33 minutes.In an American university., students are expected to arrive at the appointed (4) Classes not only begin, but also end at the (5) time in the United States. In the Brazilian class, only a few students left the class at noon; many (6) past 12:30 to discuss questions. (7) arriving late may not be very important in Brazil, (8) is staying late. The (9) for these differences is complicated. People from Brazilian and North American (10) have different feeling about lateness. In Brazil, the students believe that a person who usually (11) than a person who is always (12) . In fact, ..Brazilians expect a person with (13) or prestige to arrive late, while in the United States lateness is usually (14) disrespectful and unacceptable. (15) , if a Brazilian is late for an appointment with a North American , the American may misinterpret the (16) and become angry.As a result of his study, the professor learned that the Brazilian students were not being (17) to him. Instead, they were simply be having in the (18) way for a Brazilian student in Brazil. Eventually, the professor was able to (19) his own behavior so that he could feel (20) in the new culture. 4（）
The professor talked to American and Brazilian students about lateness in both an informal and a formal situation: lunch with a friend and in a university class, respectively. He gave them an example and asked them how they would (1) if they had a lunch appointment with a friend, the average American student (2) lateness as 19 minutes after the (3) time. On the other hand, the average Brazilian student felt the friend was late after 33 minutes.In an American university., students are expected to arrive at the appointed (4) Classes not only begin, but also end at the (5) time in the United States. In the Brazilian class, only a few students left the class at noon; many (6) past 12:30 to discuss questions. (7) arriving late may not be very important in Brazil, (8) is staying late. The (9) for these differences is complicated. People from Brazilian and North American (10) have different feeling about lateness. In Brazil, the students believe that a person who usually (11) than a person who is always (12) . In fact, ..Brazilians expect a person with (13) or prestige to arrive late, while in the United States lateness is usually (14) disrespectful and unacceptable. (15) , if a Brazilian is late for an appointment with a North American , the American may misinterpret the (16) and become angry.As a result of his study, the professor learned that the Brazilian students were not being (17) to him. Instead, they were simply be having in the (18) way for a Brazilian student in Brazil. Eventually, the professor was able to (19) his own behavior so that he could feel (20) in the new culture. 19（）
在某市为评价一种新疫苗接种的预防效果的研究中，接种疫苗组的发病率为4/10万，接受安慰剂组的发病率为8/10万，该疫苗的保护率为
______ one has a child will one realize how great one's parents are.
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