问题 单项选择题

并联电容器装置的合闸涌流限值,宜取电容器组额定电流的()倍;当超过时,应采用装设串联电抗器予以限制。电容器组投入电网时的涌流计算,应符合GB50227中附录A的规定。

A.10

B.15

C.20

D.25

答案

参考答案:C

阅读理解

It seems school children all over the world are not satisfied with their school food. Cherie Blair, the wife of 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 dining halls, which serve everything from noodles to rice, but not hamburgers and chips. Other children bring food from home such as cold rice balls, meat or fish, and vegetables.

The United States

A common menu from a US school is made up of a hamburger with fried(油炸的)potatoes or roast chicken, fruit and cookies. School lunches must also provide food with protein(蛋白质),vitamin A, vitamin C, ironand calories.

Australia

Meat piesand 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-labeled (标签) foods includingchocolate and soft drinks, is served only twice a week. Healthier green-labeled foods such as sandwiches, corn and watermelon, however are served 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 1:30 pm 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 illnesses, some schools in towns have led the way towards better nutrition(营养). Now students at these schools are provided with lunches of porridge(粥) with vegetables, such as cabbages, carrots and tomatoes.

小题1:Which belongs to red-labeled food in Australia?

A.sandwiches

B.apple juice

C.tomatoes

D.corn小题2:What does the underlined word ‘obesity’ in the last paragraph probably mean?

A.allowances(补贴)

B.sadness

C.nutrition

D.overweight小题3:What is the main idea of the passage?

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

B.Schools should try to satisfy the needs of studemts.

C.Schools serve different foods from country to country.

D.School children all over the world dislike their school food.

选择题