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问题 单项选择题

环境管理体系的模式建立在一个由( )诸环节构成的动态循环过程的基础上。

A．策划、实施、检查、评审和改进
B．发起、实施、检查、评审和改进
C．策划、发起、检查、评审和改进
D．策划、实施、评审、检查和改进

答案

参考答案：A

单项选择题

女，32岁，足月妊娠刮宫产术后半年，不哺乳、月经已复潮，但周期不规则，平素经量多，有贫血史，首选的避孕方法为

A．宫内节育器

B．安全期避孕

C．安全套

D．输卵管绝育术

E．口服短效避孕药
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单项选择题

待测粉末与乙醇和水共同加热至沸腾。（）

A．Shake the powder being examined with chloroform, filter and reserve the extracted powder.

B．Shake the powder being examined with chloroform, filter and evaporate almost to dryness on a water bath.

C．Heat the powder being examined with a mixture of water and hydrochloric acid in a water bath.

D．Heat the powder being examined to boiling with a mixture of ethanol and water.

E．Shake the powder being examined with sulphuric acid, filter and wash the filter with sulphuric acid.
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