炉烟囱排入大气的废气温度高于周围空气温度所造成的损失称为()损失。A、散热 B、排烟

题型:单项选择题

问题:

炉烟囱排入大气的废气温度高于周围空气温度所造成的损失称为()损失。

A、散热

B、排烟

C、完全燃烧

D、不完全燃烧

考点:集输工考试集输高级工考试集输高级工考试题库
题型:单项选择题

阅读理解。

     If you go to a fast food restaurant, you will probably see a lot of teenagers. Today, many teenagers are

overweight, and some of this is because of their bad eating habits. Most teenagers love food with a lot of

fat, oil, salt and sugar. People often call this kind of food "junk food".

     But bad eating habits go beyond fast food. We find many teenagers eat unhealthily. Some don't have

breakfast before they go to school. During the day, some don't have a proper meal for lunch. In a recent

survey at one school, scientists found that over two-thirds of the students didn't follow a healthy diet. They

didn't like vegetables, and many of them didn't like to eat fruits. They preferred to eat food with a lot of salt,

sugar or fat.

     Parents today also worry about their children's diet. Some doctors give the following advice: 

    Teenagers shouldn't eat too much junk food.

    Teenagers shouldn't eat food with too much salt. Salt can cause high blood pressure in the future. 

    Teenagers should eat food with less fat, oil and sugar.

    Teenagers need to eat some fruits and vegetables every day. Fruits and vegetables are rich in vitamins and

have little fat.

    Teenagers need to drink more milk. Milk will help their bones grow.

    Teenagers need to eat breakfast every day. This is good for their body and mind.

1. The main reason why many teenagers are overweight is that they eat too much ______. [ ]

A. milk and sugar

B. fruits and sugar

C. vegetables and salt

D. fat, oil, salt and sugar

2. In a recent survey at one school, what did the scientists find? [ ]

A. Teenagers don't have breakfast before going to school.

B. Teenagers have a bad eating habits.

C. Teenagers don't like eating vegetables.

D. Teenagers don't have a proper meal for lunch.

3. Why is milk important to us? [ ]

A. Because it will help the bones to grow.

B. Because it is good for the body and mind.

C. Because it is with less fat, oil and sugar.

D. Because it is junk food.

4. In this passage, doctors advise teenagers to eat more ______. [ ]

A. food with less salt and milk

B. food with much fat and sugar

C. vegetables and fruits

D. food with no salt and oil

5. The best title for this passage should be ______. [ ]

A. Keeping good habits

B. Fast food is good

C. Unhealthy food is bad

D. Advice on healthy eating

题型:单项选择题

找规律(用n表示第n个数):

(1)2,5,10,17,26,…,请写出第n个数;

(2)2,4,8,16,32,64,…,请写出第n个数。

题型:单项选择题

保监会对部分行业的危险单位划分提出了指引要求,如:通常的石化企业不进行危险单位,仅一些特殊石化企业在相邻两个工艺装置生产区域之间的最小距离达到了()米以上时可划分危险单位;高速公路财产险每一危险单位的最低长度为()公里。

题型:单项选择题

急性心肌梗死的并发症包括()

A.心律失常

B.心脏破裂

C.栓塞

D. * * 肌功能失调或断裂

E.心室壁瘤

题型:单项选择题

关于液体的表面张力,下面说法中正确的是 [ ]

A.表面张力是液体各部分间的相互作用

B.液体表面层分子分布比液体内部稀疏,分子间相互作用表现为引力

C.表现张力的方向总是垂直液面,指向液体内部的

D.表面张力的方向总是沿液面分布的

更多题库