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问题 单项选择题


以下提供若干个案例，每个案例下设若干个考题。请根据答案所提供的信息，在每道题下面的A、B、C、D、E五个备选答案中选择一个最佳答案。

牙防指导组派出一专家小组到某氟牙症流行地区调查流行状况及其影响因素。根据研究计划，他们进行了以下工作

饮水氟含量适宜浓度为

A．0.2～0.6ppmF

B．0.7～1.0ppmF

C．1.0～1.5ppmF

D．1.5～2.0ppmF

E．2～2.5ppmF

答案

参考答案：B

选择题

人的成熟红细胞.上皮细胞.精子.卵细胞.受精卵中染色体数目依次是( )

A．0，23，46，46，46

B．0，46，23，23，46

C．23，46，23，23，23

D．46，23，23，23，46
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单项选择题

A primigravida in labor for 13 hours clenches her fists, tightens her muscles, and screams during every contraction. Her reaction to labor seems exaggerated compared to the contraction pattern recording from the electronic fetal monitor (EFM). What’s the nurse’s best response（）

A. Explain to the client that the EFM shows mild contractions, so she should just relax and let the contractions work.

B. Take over as her coach because her husband isn’t helping her properly.

C. Ignore her reactions, realizing that this is her first time in labor and her reactions will soon match the intensity of contractions shown on the EFM.

D. Palpate her abdomen to determine the intensity of labor contractions as they’re taking place.
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