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【简答题】
为了确定电极电势,需要采用相对的参考标准。参比电极的选择是不是随意的?有什么限制条件?用得比较多的参比电极有哪些?
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举一反三
【单选题】In China Atoday, most university students Bare depend Con their parents Dfor finance aid.
A.
B.
C.
D.
【单选题】患者男，37岁，因“右侧肢体无力10d”来诊。无发热、头痛及意识障碍。既往扩张型心肌病病史4年，否认高血压、糖尿病、高脂血症病史。10年前因车祸外伤曾手术并输血。无烟酒嗜好。查体：血压正常；无颈强直。实验室检查：血糖正常，胆固醇5.49mmol/L，LDL-C3.60mmol/L。心脏彩色超声：左心室内径明显增大，射血分数明显降低。颅脑CT：多发脑梗死。首先考虑的检查项目不包括（）
A.
血常规
B.
脑脊液检测
C.
血培养
D.
颅脑CT血管造影
E.
颅脑MRI
【单选题】正常情况下，颈动脉窦内压在下列哪个范围变动时，压力感受性反射的敏感性最高?
A.
30～50mmHg
B.
70～90mmHg
C.
90～110mmHg
D.
130～150mmHg
【单选题】The underlined sentence in Paragraph 2 means that ______.
A.
the schools and parents are connected by the Internet so that teachers will leave school
B.
parents can find out what happens with their children in school by visiting the Internet and so will the teachers
C.
parents and educators may discover that schools are strange by using computers
D.
the schools are online parents now can teach their children and the teachers are to go
【单选题】As the sole heir and focus of their parents’ expectations, hopes and dreams, some react with rebellious and prideful attitudes and behavior toward their parents.
A.
hopes and dreams, some react with rebellious and prideful attitudes and behavior toward their parents.
B.
some react with rebellious and prideful attitudes and behavior toward their parents.
C.
some react with rebellious and prideful attitudes and behavior.
【单选题】正常情况下，颈动脉窦内压在下列哪个范围变动时，压力感受性反射的敏感性最高?
A.
30～50mmHg
B.
70～90mmHg
C.
90～110mmHg
D.
130～150mmHg
E.
150～170mmHg
【单选题】正常情况下,颈动脉窦内压在下列哪个范围内变动时,压力感受性反射的敏感性最高
A.
4.00~6.67kPa(30~50mmHg)
B.
9.33~12.0kPa(70~90mmHg)
C.
12.0~14.7kPa(90~110mmHg)
D.
17.3~20.0kPa(170~190mmHg)
E.
22.7~25.3kPa(170~190mmHg)
【多选题】患儿男，10岁，因“低热伴头痛、咽痛和腹痛2d，进食困难，嗜睡6h”来诊。时有哭闹不安。1周前曾被流浪猫咬伤。查体：T38℃；意识清楚，查体合作；心、肺无异常；颈强直，四肢肌张力增高；左小腿一较深伤口，局部红肿。为明确诊断，应进行的检查项目包括（）
A.
血常规
B.
尿常规
C.
血细菌培养
D.
脑脊液常规
E.
脑脊液病毒分离
F.
红细胞沉降率和血C-反应蛋白
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