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【简答题】

Passage Two Although many of us may feel air-conditioners bring relief from hot, humid or polluted outside air, they pose many potential health hazards. Much research has looked at how the movement of air inside a closed environment---such as an office building---can spread disease or expose people in the building to harmful chemicals. One of the more widely publicized ers is that of Legionnaire’s disease, which was first recognized in the 1970s. This was found to have affected people in buildings with air-conditioning systems in which warm air pumped out of the system’ s cooling towers was somehow ed back into the air intake ( 通风口 ),in most cases due to poor design. The warm air, filled with bacteria, was combined with cooled, conditioned air and was then circulated around various parts of the building. Studies showed that even people outside such buildings were at risk if they walked past air exhaust pipes. Large air-conditioning systems add water to the air they circulate by means of humidifiers ( 湿度调节器 ).In older systems, the water used for this process is kept in special reservoirs, the bottoms of which provide breeding grounds for bacteria which can find their way into the ventilation ( 通风 )system. The risk to human health from this situation has been highlighted by the fact that the immune systems ( 免疫系统 )of approximately half of workers in air-conditioned office buildings have developed the ability to fight off the organisms found at the bottom of system reservoirs. But chemicals called “biocides”are added to reservoirs to make them germ-free, and they are erous in their own right in sufficient quantities, as they often contain compounds strongly linked to cancers. Finally, it should be pointed out that the artificial climatic environment created by air-conditioners can also affect us. In a natural environment, whether indoor or outdoor, there are small variations in temperature and humidity. Indeed, the human body has long been accustomed to these normal changes. In an air-conditioned living or working environment, however, body temperatures remain well under 37c , our normal temperature. This leads to a weakened immune system and thus greater exposure to diseases such as colds and flu.

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参考答案:
举一反三

【单选题】免疫系统包括

A.
免疫细胞、黏膜免疫系统、中枢免疫器官
B.
免疫器官、免疫细胞、免疫分子
C.
中枢免疫器官、免疫细胞、皮肤免疫系统
D.
免疫分子、黏膜免疫系统、皮肤免疫系统

【单选题】免疫系统包括

A.
胸腺、骨髓、淋巴结、脾脏、扁桃体、黏膜伴随淋巴组织
B.
免疫组织、免疫细胞
C.
中枢免疫器官、外周免疫器官
D.
免疫器官、免疫细胞、免疫分子
E.
抗原、抗体、补体

【单选题】新生儿免疫系统的特点是

A.
特异性免疫较成熟
B.
非特异性免疫不成熟
C.
皮肤黏膜屏障功能好
D.
血中补体含量高
E.
趋化因子丰富

【单选题】免疫系统的组成是

A.
中枢免疫器官、免疫细胞、皮肤免疫系统
B.
免疫分子、黏膜免疫系统、皮肤免疫系统
C.
中枢免疫器官、周围免疫器官
D.
免疫细胞、黏膜免疫系统、中枢免疫器官
E.
免疫器官、免疫细胞、免疫分子
相关题目:
【单选题】免疫系统包括
A.
免疫细胞、黏膜免疫系统、中枢免疫器官
B.
免疫器官、免疫细胞、免疫分子
C.
中枢免疫器官、免疫细胞、皮肤免疫系统
D.
免疫分子、黏膜免疫系统、皮肤免疫系统
【单选题】免疫系统包括
A.
胸腺、骨髓、淋巴结、脾脏、扁桃体、黏膜伴随淋巴组织
B.
免疫组织、免疫细胞
C.
中枢免疫器官、外周免疫器官
D.
免疫器官、免疫细胞、免疫分子
E.
抗原、抗体、补体
【单选题】新生儿免疫系统的特点是
A.
特异性免疫较成熟
B.
非特异性免疫不成熟
C.
皮肤黏膜屏障功能好
D.
血中补体含量高
E.
趋化因子丰富
【单选题】免疫系统的组成是
A.
中枢免疫器官、免疫细胞、皮肤免疫系统
B.
免疫分子、黏膜免疫系统、皮肤免疫系统
C.
中枢免疫器官、周围免疫器官
D.
免疫细胞、黏膜免疫系统、中枢免疫器官
E.
免疫器官、免疫细胞、免疫分子
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