head lice and general uncleanliness in schools.
学校里的头和普遍肮脏。
head lice and general uncleanliness in schools.
学校里的头和普遍肮脏。
Several distinct rickettsiae (a parasite carried by ticks, fleas, and lice) cause a disease known as typhus in humans.All cause disease with similarities of fever, headache, and rash.
由几种不同的发疹伤寒病原体(可由壁,
,
子等寄生虫传播)
起的疾病被人们
疹伤寒。
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