While the virus can spread through droplets propelled into the air when a cold-sufferer coughs or sneezes, surprisingly, this is not the most common route of transmission. Numerous studies have now shown that the overwhelming majority of colds are "caught" by hand contact. A cold-sufferer rubs her nose, thereby transferring the virus to her hand. Then a friend comes to visit.
"Don't kiss me," she cautions, so the friend steps back and presses her hand. The friend then wipes her own nose or eye--and several days later is stricken with a cold. Or parents pick up their child's discarded(丢弃了的)tissues and carefully throw them away, but fail to wash their hands afterward.
Cold viruses also can be transferred to objects--telephones, towels, plates--and remain infections for up to three hours. Frequent hand-washing--on the part of the cold-sufferer as well as other members of the household--will minimize the spread of viruses in this way.
Colds are caused by exposure to severe weather.
A.Right
B.Wrong
C.Not mentioned
第1题
浆膜腔积液中出现浆细胞见于
A、膈下脓肿
B、结缔组织疾病
C、化脓性积液
D、血管炎
E、充血性心力衰竭
第3题
浆膜腔积液腺苷脱氨酶活性增高,最常见于
A.脓性积液
B.肿瘤性积液
C.狼疮性积液
D.结核性积液
E.浆液性积液
第8题
以上疾病中浆膜腔积液以浆细胞升高为特点的是
A.化脓性积液
B.骨髓瘤
C.慢性结核
D.肺梗死
E.浆膜受刺激
第9题
A.化脓性积液
B. 骨髓瘤
C. 慢性结核
D. 肺梗死
E. 浆膜受刺激
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