皮皮学,免费搜题
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搜题
【单选题】
UM71型无绝缘轨道电路自动闭塞,电源电压范围在直流()可靠工作。
A.
24V
B.
28V
C.
30V
D.
38V
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举一反三
【单选题】关于洛贝林的叙述,不正确的是
A.
刺激颈动脉体化学感受器,反射性兴奋呼吸中枢
B.
作用持续时间长,安全范围大,很少引起惊厥
C.
临床可用于新生儿窒息
D.
大剂量可引起心动过缓、传导阻滞
E.
过大剂量可致心动过速
【单选题】News Item 5 With a national strike by shopkeepers and businessmen in Zimbabwe going into its second day, further serious disruption is expected across the country. The government has said it intends t...
A.
Employees demanding higher pay.
B.
Tax increases by the government.
C.
Head teachers closing their schools.
D.
Employees being denied the right to work.
【单选题】抽象层次___的概念往往包含多个抽象层次_____的概念,并且它经常是难以直接观察和描述的。
A.
低   高
B.
高   高
C.
高  低
D.
低   低
【单选题】Civil servants who are concerned with administration are forbidden ——.
A.
to be voters at elections
B.
to be candidates for parliament
C.
to continue their work when government changes
D.
to compete with others for a higher rank
【单选题】News Item 5 With a national strike by shopkeepers and businessmen in Zimbabwe going into its second day, further serious disruption is expected across the country. The government has said it intends t...
A.
those who supported the illegal tax increases
B.
shopkeepers and businessmen
C.
whoever has supported the strike
D.
Zimbabwean business leaders
【判断题】压电晶体可以用来测量震动和加速度。
A.
正确
B.
错误
【单选题】关于颈动脉体和主动脉体化学感受性反射的叙述,哪一项是错误的
A.
平时对心血管活动不起明显的调节作用
B.
在低氧、窒息和酸中毒等情况下发挥作用
C.
对于感受动脉血低氧是十分重要的
D.
可引起呼吸减慢
E.
可引起呼吸加深加快
【单选题】外周血网织红细胞明显增多最常见于下列哪种疾病?( )
A.
缺铁性贫血
B.
再生障碍性贫血
C.
铁粒幼细胞性贫血
D.
珠蛋白生成障碍性贫血
E.
溶血性贫血
【单选题】()的重刀武术被列人国家级非物质文化遗产名录。
A.
藏族
B.
蒙古族
C.
回族
D.
朝鲜族
【单选题】在保持自然呼吸的情况下,下列关于颈动脉体、主动脉体化学感受性反射效应的叙述中,哪一项是错误的
A.
使呼吸加深加快
B.
使心率加快,心输出量增加
C.
使外周血管阻力增大,血压升高
D.
使心、脑血流量减少
E.
在平时对心血管活动并不起明显的调节作用
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