低氧对呼吸的兴奋作用是通过() A.直接兴奋延髓吸气神经元 B.直接兴奋脑桥呼吸调整

题型:单项选择题 A1型题

问题:

低氧对呼吸的兴奋作用是通过()

A.直接兴奋延髓吸气神经元

B.直接兴奋脑桥呼吸调整中枢

C.外周化学感受器所实现的反射性效应

D.刺激中枢化学感受器而兴奋呼吸中枢

E.直接刺激呼吸中枢

考点:临床执业医师呼吸呼吸题库
题型:单项选择题 A1型题

世界上最长的山脉是

A.落基山脉

B.安第斯山脉

C.喜马拉雅山脉

D.阿特拉斯山脉

题型:单项选择题 A1型题
请认真阅读下列短文,并根据所读内容在文章后表格中的空格里填入一个最恰当的单词。注意:每个空格只填1个单词。请将答案写在答题卡上相应题号的横线上。
Health researchers have noticed that some groups of people are more consistently healthy than others, and wondered… Is it race? Income? Where you live? In the United States, these disagreements in health outcomes have been the focus of intense research for the past several decades.
Harvard University health policy researcher Ellen Meara says scholars have found some clues as to why some groups of people have more or less disease than others. She says one important factor in people’s health is the amount of education they have.
In her most recent paper, Meara looked at data from the United states census. These counts of people occur every 10 years. Meara and her colleagues examined data from several decades.
“We looked at life expectancy(预测寿命) at age 25,” Meara says.
“How many additional years can you expect to live if you arrive at age 25 and your education has stopped at high school, or sooner? Versus how many years, can you expect to live if you’ve reached aged 25 and you’ve gone on to at least some college…”
Meara says they found that in 1990, a 25-year-old who only had some secondary school could expect to live for a total of 75 years. In 2000, a 25-year-old with some secondary education could also expect to live to the age of 75.
In contrast, for a better educated 25-year-old, they could expect to live to the age of 80 in 1990. Someone with a similar education level in the year 2000, could expect to live to be more than 81 years, 81.6 years to be exact.
Meara says, not only do better-educated people live longer to begin with, but in the past ten years, more educated people have made gains in the length of their lives. Meanwhile, the life expectancy hasn’t changed for less educated people.
Some of these gains can be explained. Meara says researchers know that people who are more educated are more likely to quit smoking cigarettes, or not start at all, compared to people with less education.
“I think it’s a reminder not to be satisfactory,” Meara says. “Just because a population overall appears to be getting healthier, it doesn’t always mean that those advantages and successes that many people have enjoyed really extend into all parts of the population. And I think that’s something to really pay attention to regardless of whether you live in the US or elsewhere.”
Meara points out that education can often determine income---people with more education frequently make more money. This makes them aware of health care, and purchase other resources and services that can keep them healthier. But the data on income do NOT show that people who make more money are automatically healthier.
Meara says education is key. People need to be educated in order to take advantage of opportunities for better health.
Title
The Amount of 小题1:Contributes to People’s Health
 
The less educated people
The 小题2:______ educated people
Comparisons
In 1990
They could live for 75 years
They could live to the age of 80
In 2000
Their life expectancy was the same as in 1990.
They could live to the age of 81.6 小题3:____
小题4:___ of the research
In the past ten years
Their life expectancy remained 小题5:_____.
They’ve made gains in the length of their lives, partly due to their 小题6:__ smoking.
People are getting healthier, but it doesn’t mean that the advantages and successes extend into all parts of the 小题7:____.
Education小题8:____income.
People with more education make more money
Getting more money helps to increase their小题9:___ of health care, which can keep them healthier.
小题10:____
Education is the key to better health.
 
题型:单项选择题 A1型题

关于关键酶下述描述错误的是()。

A.关键酶常是变构酶

B.在代谢途径中活性最高

C.常位于代谢途径第一步反应

D.常催化单向反应

E.常是受激素调节的酶

题型:单项选择题 A1型题

去世100年后,挪威最伟大的文学家______是易卜生,他给挪威民族带来的荣誉,比别的任何挪威人都要多,然而,这个人生前从不______自己是挪威人______他是他自己的祖国和上帝。
填入横线部分最恰当的一项是( )。

A.已经 知道

B.始终 认为

C.依然 承认

D.公认 希望

题型:单项选择题 A1型题

钢的质量好坏是按其中的硫、磷含量来区分的。

更多题库