影响中心静脉压高低的因素是() A.外周静脉压和静脉血液阻力 B.心脏射血能力和外周

题型:单项选择题

问题:

影响中心静脉压高低的因素是()

A.外周静脉压和静脉血液阻力

B.心脏射血能力和外周阻力

C.动脉血压和静脉血压

D.心脏射血能力和静脉回心血量

E.血管容量和循环血量

考点:北京住院医师全科医学Ⅰ阶段北京住院医师全科医学(综合练习)北京住院医师全科医学(综合练习)题库
题型:单项选择题

颜色定位就是将颜色进行量化的一种方法。

题型:单项选择题

It seems school children all over the world complain about their school food. Cherie Blair, the wife of previous Prime Minister Tony Blair, said that she would prepare a packed lunch for her son if school dinners do not improve. So what do students of your age eat for lunch at school?

Japan

High schools have canteens(食堂), which serve everything from noodles to rice, but not burgers and chips. Other children bring food from home such as cold rice balls, meat or fish, pickles(泡菜) and vegetables.

Students take home a menu for the coming month containing notes on nutrition(营养)value. Twice a year parents are invited to have a taste of the food. The class with the fewest leftovers(剩饭) at the end of the month receives a prize.

Untied States

A typical menu from a US school is made up of a hamburger with fried potatoes or roast chicken, lettuce and pickles, fruit and cookies. School lunches must also provide at least one-third of the daily dietary allowances (定量) of protein, vitamin A, vitamin C, iron, calcium, and calories.

Australia

Meat pies, sausage rolls and hotdogs are all traditional dishes in Australian school shops. But as the nation pays more attention to children’s health, healthier foods have started to find their way onto school menus.

Many schools have used a traffic light system. The sale of red-labelled foods, including pastries, chocolate and soft drinks, is served only twice a week. Healthier green-labelled foods such as sushi (寿司), sandwiches, corn and watermelon, however, are available every day.

In some schools, students have a choice of up to 89 foods to choose from, including popcorn and rice.

South Africa

Most of South Africa’s schools do not serve meals at all. Classes end at 1:30pm and students get their own lunches. Many students bring food from home, usually sandwiches.

Fast food and fried food sell the best among students, which has led to a rise in obesity among children. But as more people began to realize the fact that being too fat may cause different diseases, some schools in towns have led the way towards better nutrition. Now students at these schools are provided with lunches of porridge with vegetables, such as cabbages, onions, beans, carrots and tomatoes.

小题1:What does the underlined word “obesity” in the last paragraph probably mean?

A.Nutrition.

B.Addiction.

C.Food shortage.

D.Overweight.小题2:We can infer from the passage that ________.

A.a typical menu from a US school consists of enough nutrition.

B.most students in South Africa eat their lunch at home.

C.many schools in Australia have traffic lights outside their school.

D.you can have whatever you like in school canteens in Japan.小题3:What is the main idea of the passage?

A.Schools should try to satisfy the needs of students.

B.Schools serve different foods from country to country.

C.Food served in the US is the best of all.

D.School children all over the world dislike their school food.小题4:The article is written for ________.

A.parents

B.schoolmasters

C.students of your age

D.nutritionists

题型:单项选择题

下图示意平顶海山的形成过程。读图,平顶海山()

A、为褶皱山

B、由沉积岩构成

C、顶部形态由内力作用塑造

D、随着板块的移动没入水下

题型:单项选择题

当接地体全部打入地下后,应在四周用土壤埋入但不需夯实。

题型:单项选择题

焊(割)嘴必须用螺母压紧,不得有松动和()。

更多题库