某家庭中父亲是肺结核患者，大儿子在父亲患病后即接种了卡介苗，_爱下问搜题

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问题实验题

某家庭中父亲是肺结核患者，大儿子在父亲患病后即接种了卡介苗，二儿子和小儿子未接种卡介苗，结果，二儿子也患上了肺结核病，请回答：

（1）二儿子患病前，家庭中的传染源是，易感者是。

（2）从预防传染病的一般措施看，对二儿子采取隔离措施属于；对他们的饮食用具进行消毒属于；禁止其亲人随便去医院探望属于。

答案

（1）父亲儿子

（2）控制传染源切断传播途径保护易感人群

题目分析：（1）肺结核是由结核杆菌引起的呼吸道传染病，传染源主要是散播菌的肺结核患者，通过呼吸道传播．因此其病原体是细菌．父亲已经患病，能够散播病原体，属于传染源．儿子患病前体内没有抵抗此结核杆菌的抗体，属于易感人群，患病后属于传染源．

（2）从预防传染病的一般措施看，对二儿子采取隔离措施属于控制传染源，对他们的饮食用具进行消毒属于切断传播途径；禁止其亲人随便去医院探望属于保护易感人群．

写作题

第四部分读写任务 (共1小题，满分30分)

阅读下面的短文，然后按照要求写一篇150词左右的英语短文。

[阅读材料]

An elderly carpenter（木匠） was ready to retire．He told his employer of his plans to leave the house-building business and live a more leisurely life with his wife enjoying his extended family．He would miss the paycheck, but he needed to retire．They could get by．

The employer was sorry to see his good worker go and asked if he could build just one more house as a personal favor．The carpenter said yes, but in time it was easy to see that his heart was not in his work．He resorted to（采用） poor workmanship(工艺，手艺) and used inferior（低劣的） materials．It was an unfortunate way to end a dedicated career．

When the carpenter finished his work, the employer came to inspect the house．He handed the front-door key to the carpenter．"This is your house," he said, "my gift to you．"

The carpenter was shocked! What a shame! If he had only known he was building his own house, he would have done it all so differently．

[写作内容]

1．以约30个词概括短文的要点；

2．以约120个词在这个故事内容的基础上展开讨论并包括以下内容：

（1）今天的付出和明天的收获之间的关系；

（2）构筑房屋和构建生活之间的关系；

（3）对你的议论进行总结。

[写作要求]

1. 作文中可使用自己的亲身经历或虚构的故事，也可以参照阅读材料的内容，

但不得直接原文抄袭。

2. 题目自拟。

[评分标准] 概括准确，语言规范，内容合适，篇章连贯。

单项选择题

下列哪个密码子为启动密码子?（）

A.GTA

B.AUG

C.AAG

D.UGG