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问题 选择题

明明吃了不洁净的水果而患了蛔虫病，这里的不洁净的水果属于传染病的哪个基本环节（　　）

A．病原体

B．传染源

C．传播途径

D．易感人群

答案

A、病原体是能引起人和动物传染病的微生物和寄生虫的统称，不洁净的水果不属于病原体，A错误．

B、传染源是指能够散播病原体的人或动物；B错误．

C、传播途径是指病原体离开传播源到达健康人所经过的途径，如病人的排泄物，分泌物和传播疾病的生物或非生物媒介等；不洁净的水果属于传染病的传播途径，C正确．

D、易感人群是指对某些传染病缺乏免疫力而容易感染该病的人群，D错误．

故选：C

完形填空

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Why is pink or purple a color for girls and blue or brown for boys?

The answer depends largely    小题1:   cultural values as well as personal experiences. To the Egyptians, green was a color    小题2:   represented the hope and joy of spring, while for Muslims, it means heaven. Red is a symbol of good luck in many cultures. During the Spring Festival in China, children    小题3:  (give) money in a red envelope to bring good fortune in the New Year. For many nations, blue is a symbol of protection and religious beliefs. Greek people often wear a blue necklace hoping to protect    小题4:   against evils（灾祸）.

People’s    小题5:  (choose) of colors is also influenced by their bodies’ reactions toward them. Green is said to be    小题6:   most restful color. It has the ability to reduce pain and relax people both mentally    小题7:   physically. People    小题8: (work) in green environment have been found to have fewer stomach aches.

Red can cause a person’s blood pressure to rise and increase people’s appetites（食欲）. Many decorators will include different shades of red in the restaurant. And many commercial websites will have a red “Buy Now” button because red is a color that    小题9:  (easy) catches a person’s eye.

Blue is another calming color. Unlike red, blue is believed to cause people to lose appetite. So    小题10:   you want to eat less, some suggest that eating from blue plates can help.
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多项选择题

反映肝纤维化时胶原合成和降解的指标包括（）。

A.Ⅲ型前胶原氨基末端肽（PⅢP）

B.Ⅳ胶原及其降解片段

C.层粘连蛋白

D.透明质酸

E.Ⅰ型胶原
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