男,18岁。运动员常规体检时心电图示心室率50次/分。P-R间期0.21秒,P-R间

题型:单项选择题 A1型题

问题:

男,18岁。运动员常规体检时心电图示心室率50次/分。P-R间期0.21秒,P-R间期及R-R间期恒定不变,QRS波群形态和时限正常。最可能的诊断为()。

A.二度Ⅰ型房室传导阻滞

B.二度Ⅱ型房室传导阻滞

C.三度房室传导阻滞

D.心房颤动伴差异性传导

E.一度房室传导阻滞

考点:临床执业医师专业综合第二章心血管系统专业综合第二章心血管系统题库
题型:单项选择题 A1型题
根据对话内容选项恰当的句子,有两项为多余的。
A. What time is it
B. What day is it today
C. What's the date today
D. What can we do now
E. Do you have a sharpener
F. Let's go to the supermarket
G. Let's go and see
A: Excuse me. 1_____?   
B: Sorry, I don't have one.   
A: So I must go to the shop near our school.   
B: I think the shop is closed at this time of day.   
A: 2_____.   
B: It's Friday. On Friday the shop closes early.   
A: 3_____?   
B: Look, it says "closed".   
A: Oh, dear! you're right. It is closed. 4_____?   
B: 5_____. It's open 24 hours.   
A: OK, Let's go.
题型:单项选择题 A1型题

下列化学用语书写正确的是

A.2个氢原子:H2

B.硝酸根离子:NO3

C.2个氧分子:2O

D.氯化铜:CuCl

题型:单项选择题 A1型题

Duchenne肌营养不良最具特征性的体征是()

A.龙贝格征(Rombergsign)

B.克尼格征(Kernigsign)

C.麦克尤恩征(MacEwensign)

D.Gowers征

E.巴宾斯基征(Babinskisign)

题型:单项选择题 A1型题

为适应系统内外变化而进行的局部和全局的调整是管理的()。

A.维持职能

B.控制职能

C.创新职能

D.协调职能

题型:单项选择题 A1型题

绞车开动前,必须对信号检查达到()要求。

A、声光兼备

B、有声无光

C、有光无声

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