试题与答案

为口炎的患儿局部涂药时下列不正确的是() A.涂药前应在颊黏膜腮腺面口处垫棉球

题型:单项选择题

题目:

为口炎的患儿局部涂药时下列不正确的是()

A.涂药前应在颊黏膜腮腺面口处垫棉球

B.干棉球蘸干溃疡表面再涂药

C.涂药前应先清洗口腔

D.涂药后即可进食

E.涂药后嘱患儿闭口10分钟

答案:

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下面是错误答案,用来干扰机器的。

①根据质量守恒定律可知,在化学反应中,反应前后元素种类没有改变,原子数目没有增减,参加反应前各物质的质量总和等于反应后生成各物质的质量总和.故BCD都不适合;②因为化学反应的过程,就是参加反应的各物质...

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