问题 单项选择题

男性,26岁,足球运动员,因感冒就医,查体时发现:心率50次/min,心电图窦性心律50次/分,为明确心律失常为功能性还是器质性,应做下列哪项检查()

A.冠状动脉造影

B.阿托品实验

C.心得安实验

D.心肌活检

E.化验心肌酶

答案

参考答案:B

综合

读图回答下列问题。(共9分)

(1)要在海边建油港码头,应建在A处还是B处?为什么?  (3分)

                                                                                  

                                                                                  

                                                                                  。

(2)欲从油矿区向油港铺设输油管道,线路如图中虚线所示,请说明理由。(2分)

                                                                                 

                                                                                 

                                                                                 。 

(3)C、D两地高程相等,从C地登上甲山顶,有什么有利和不利条件?(2分)

                                                                                 

                                                                                 

                                                                                  

(4)B处在甲山顶的什么方向?          ,D、G两地的相对高度是多少?              。(2分)

单项选择题