下列哪个因素使心排血量减少() A.前负荷增加 B.后负荷减少 C.体内儿茶酚胺增加

题型:单项选择题

问题:

下列哪个因素使心排血量减少()

A.前负荷增加

B.后负荷减少

C.体内儿茶酚胺增加

D.后负荷增加

E.回心血量增加

考点:福建住院医师麻醉科福建住院医师麻醉科(综合练习)福建住院医师麻醉科(综合练习)题库
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以下提供若干个案例,每个案例下设若干个考题。请根据各考题题干所提供的信息,在每题下面的A、B、C、D、E五个备选答案中选择一个最佳答案。

女性,25岁,因行子宫肌瘤切除术,术前需留置导尿管

为防止逆行感染对留置尿管护理正确的是

A.贮尿袋引流管位置低于耻骨联合

B.每天倾倒1次引流袋

C.每周更换1次引流管

D.每周进行1次膀胱冲洗

E.每天更换1次导尿管

题型:单项选择题

A motto is a sentence or a phrase ___小题1:__ can inspire us especially when we are __小题2:__ (face) with difficulties. Many of us have our mottoes, such as “Where there is a will, there is a way.” Or “Nothing is difficult if you put your heart into it.”, and so on. My motto is “God helps those who help ___小题3:__.” Sometimes I am lazy and don’t want to make efforts ___小题4:___(work) hard, ___小题5:___ the moment I think of my motto I will get energetic again and devote myself to what I am doing. I write my motto ___小题6:___ I can see it easily. Every time I fail in my exam and begin to lose heart, the sight of my motto inspires me with much ___小题7:___(confident). My motto also makes me become ___小题8:___ independent person. That is to say, I won’t rely on others easily.

My friends, what is your motto? If you still haven’t got a motto, please choose ___小题9:__ because a motto can have a great effect ___小题10:___ you.

题型:单项选择题

已知(3m﹣1)x2n+1+9=0是关于x的一元一次方程,则m、n应满足的条件为m _________ ,n= _________ 

题型:单项选择题

在测定滑轮组机械效率的实验中,小刚同学测得的数据如下表所示:

(1)在表中空白处分别写出有用功、总功和机械效率的值;

(2)在下边方框中画出滑轮组及绕法;

(3)实验时,应使弹簧测力计做                       运动. 小刚同学在用弹簧测力计静止时进行读数,则他这样得出的机械效率与实际值相比____________ (填“偏小”、“偏大”或“相等”).

题型:单项选择题

阈电位是指

A.细胞发生反应的最适刺激

B.Na+ 通道开放的膜电位值

C.正反馈Na+ 内流的临界膜电位

D.正反馈K+ 外流的临界膜电位

E.Na+ 通道开始关闭的膜电位值

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