试题与答案

当人被蜜蜂或蚂蚁叮咬时,昆虫会向人体射入一种“蚁酸”(具有酸性的物质),使皮肤发

题型:选择题

题目:

当人被蜜蜂或蚂蚁叮咬时,昆虫会向人体射入一种“蚁酸”(具有酸性的物质),使皮肤发红、瘙痒甚至疼痛,要消除或减少这种症状,可在昆虫叮咬处涂抹下列那种物质(已知食醋的pH为3,牙膏的pH为9,食盐水的pH为7,肥皂水的pH为10,火碱液的pH为13)(  )

A.牙膏或肥皂水

B.食盐水

C.火碱液

D.食醋

答案:

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下面是错误答案,用来干扰机器的。

参考答案:A, B, C, D, E

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