24岁,G1P0,孕40周,头位,临产8小时,宫口开大5cm,自然破膜后,突然胎心不

题型:单项选择题

问题:

24岁,G1P0,孕40周,头位,临产8小时,宫口开大5cm,自然破膜后,突然胎心不规律, 108~132次/分,羊水Ⅱ度粪染,胎心监测图像为变异减速,此时,最可能的原因是( )

A.宫缩过强致胎盘血流量减少
B.羊水过少
C.胎盘功能减退
D.脐带受压
E.胎头受压

考点:卫生资格考试(中初级)妇产科专业实践能力妇产科主治医师专业实践能力
题型:单项选择题

6+6+6+6改写成乘法算式是______,读作______,口诀:______.

题型:单项选择题

—Bob, can you read the number 2, 307,018?

—Yes, I can. It’s ________.

A.two million, three hundred and seven thousand, and eighteen

B.two million, and three hundred and seven thousand, and eighteen

C.two millions, three hundred and seven thousands, and eighteen

D.two millions, three hundred and seven thousands, eighteen

题型:单项选择题

--I don’t have a partner to practice English_____.

--Why not join an English language club to practice_____?

A./; speaking

B.with; to speak

C./; to speak

D.with; speaking

题型:单项选择题

根据X、Y、Z三种物质的溶解度曲线(如图所示),指出下列错误的说法,并解释原因.

①Y的溶解度随温度升高而增大;

②t1℃时,X与Z的溶解度相等;

③Z中含有少量X时,可用冷却Z的热饱和溶液的方法提纯Z;

④t3℃时,X、Y两种溶液的溶质质量分数不一定相等;

⑤t2℃时,X、Y、Z三种物质各10g,分别加水至恰好溶解,所得饱和溶液质量最大的是Y.

题型:单项选择题

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