题干

某学期,一所中学突然出现了30名流感患者,学校立即采取以下措施:①各班做好晨间体检,发现疑似病人,及时离校治疗;②让30名患病学生离校治疗;③将教师等公共场所进行消毒,同时室内通风换气;④建议全校学生接种流感疫苗.请分析回答下列问题.

(1)流行性感冒是由流感病毒引起的传染病,该病毒的结构特点是:结构简单,无____ 结构,由____ 外壳和内部的____ 组成.

(2)从预防传染病措施来看,学校措施中属于控制传染源的是____  和 ____ (填序号);属于切断传播途径的是____ .(填序号)

(3)措施④中接种流感疫苗使人体获得的免疫属于____ (填“特异性”或“非特异性”)免疫.疫苗可以看做____ (填“抗体”或“抗原”)

(4)一些同学为了防止流感,自己购买了一些药物,如桑菊、板蓝根冲剂等,其包装上印有“OTC”字样,这种药属于____ 药.(填“处方”或“非处方”)

(3)注射流感疫苗使人体获得的免疫属于____ 免疫.(填“特异性”或“非特异性”)疫苗可称为____ .(填“抗体”或“抗原”)

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答案(点此获取答案解析)

细胞,蛋白质,遗传物质,①,②,③,特异性,抗原,非处方,特异性,抗原

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    Parents and kids today dress alike, listen to the same music, and are friends. Is this a good thing? Sometimes, when Mr. Ballmer and his 16-year-old daughter, Elizabeth, listen to rock music together and talk about interests both enjoy, such as pop culture, he remembers his more distant relationship with his parents when he was a teenager.

    “I would never have said to my mom, 'Hey, the new Weezer album is really great. How do you like it?''' says Ballmer. “There was just a complete gap in taste.”

    Music was not the only gulf. From clothing and hairstyles to activities and expectations, earlier generations of parents and children often appeared to move in separate orbits.

    Today, the generation gap has not disappeared, but it is getting narrow in many families. Conversations on subjects such as sex and drugs would not have taken place a generation ago. Now they are comfortable and common. And parent-child activities, from shopping to sports, involve a feeling of trust and friendship that can continue into adulthood.

    No wonder greeting cards today carry the message, “To my mother, my best friend.”

    But family experts warn that the new equality can also result in less respect for parents. “There's still a lot of strictness and authority on the part of parents out there, but there is a change happening,” says Kerrie, a psychology professor at Lebanon Valley College. “In the middle of that change, there is a lot of confusion among parents.”

    Family researchers offer a variety of reasons for these evolving roles and attitudes. They see the 1960s as a turning point. Great cultural changes led to more open communication and a more democratic process that encourages everyone to have a say.

    “My parents were on the 'before' side of that change, but today's parents, the 40-year-olds, were on the 'after' side,” explains Mr. Ballmer, “It's not something easily accomplished by parents these days, because life is more difficult to understand or deal with, but sharing interests does make it more fun to be a parent now.”