问题 单项选择题 A型题

患者男性,70岁,胸闷、心悸3天。心电图如图3-14-5所示,其阻滞部位最可能在()。

A.窦房结

B.结间束

C.房室结

D.Bachmann束

E.束支水平

答案

参考答案:E

解析:图中可见窦性P波规律出现,部分P波后无QRS波群,下传的PR间期恒定,房室传导比例为3:2;下传的QRS波群表现为完全性左束支阻滞,提示其病变多位于束支水平。

单项选择题
阅读理解

People who eat at home most of the time have better nutrition than those who go out to eat , a recent study shows. Cornell University professors Lana Hall and Karen Bunch interviewed 3900 people in the survey. “People who eat less than 30 percent of their food away from home eat the most nutritiously,” they said.

“In general, Americans don’t have nutrient, except for iron and calcium,” they reported. They have the opposite problem——over—consumption(过度消耗), especially of fat.

The food at many fast food restaurants is often low in vitamins. “People who eat more than 30 percent of total calories away from home eat foods that are generally low in nutrients per calorie,” the professors said. More calories and enough nutrient intake(吸收) are required to achieve.

One of the major health risks is eating too much fat. The professor found than fat consumption became greater as income went up. It also went up in houses where the female worked. This is probably because these people eat more highly processed (加工的)foods.

57.According to the passage, which of the following suggestions would you most readily take?

A.Eat out as many times as possible

B.Eat at home as many times as possible

C.Eat foods with a lot if iron, calcium and fat

D.Eat more highly processed foods

58.What is the result if people often dine out according to the passage?

A. They tend to have better nutrition         B. They tend to have less nutrition

C.They can save a lot of time               D. They will spend much money on it

59. Nowadays, a major health risk that people face is_______.

A.Eating too much fast food         B. Frequent dining out

C.Eating at home very often         D. Eating too much fat

60.The passage is about__________.

A. Eating and Health      B. The Life Style in Modern Society

C. Fast food in the USA    D. Dining out Lowers Nutrient Intake