催化裂化分馏一中段回流的作用是控制轻柴油的()。A、凝固点 B、闪点 C、胶质 D、

题型:单项选择题

问题:

催化裂化分馏一中段回流的作用是控制轻柴油的()。

A、凝固点

B、闪点

C、胶质

D、十六烷值

考点:催化裂化装置操作工高级催化裂化装置操作工高级催化裂化装置操作工题库
题型:单项选择题

生物兴趣小组的学生,将自己收集的标本向本组其他成员各赠送一件,全组共互赠送110件,若设全组有x名同学,则可列方程为(  )

A.x(x+1)=110

B.x(x-1)=110

C.x(x+1)=220

D.x(x-1)=220

题型:单项选择题

平酸腐败主要表现为()

A.罐头内容物酸度降低而外观正常

B.罐头内容物酸度降低并发生胖听

C.罐头内容物酸度不变而发生胖听

D.罐头内容物酸度增加并发生胖听

E.罐头内容物酸度增加而外观正常

题型:单项选择题

阅读理解。

     As is known, healthy foods can help save your life. Now, here is a list of healthy foods that can save your

memory. It is best that every person knows what he eats, as he takes in, can make or break himself, in terms

of health.

     Fish is helpful in regaining back the kind of memory that a person once has. Eating fish can help you save

the trouble of forgetfulness. Vegetables rich in fiber and other dark and green leafy kinds are very suitable for

people who want to avoid mental blocks. These foods contain high units of vitamin E.

     Another food that is considered having different effects on preventing this brain deficiency (缺陷) is

avocado (鳄梨), which is also rich in vitamins E and C. It is really good to know these healthy foods that can

save your memory are always at hand so as to help you in your fight against diseases. Sunflower seeds are

regarded as Vitamin C-powered seeds and also give you enough energy.

     As for red wine, do not over consume it, as it is said to have to be taken in moderate amounts in order to

help the body. Over-drinking can cause illness and like anything else. This is considered as one of the healthy

foods that can save your memory; alcohol can otherwise lose it.

     It is better to consume colored bread, rice and whole grains for you to get the best out of fiber. These

foods can lower the body's risk of being infected with Alzheimer's disease (老年痴呆病).

     Knowing the healthy foods that can save your memory is living the life that you have longed and desired.

Among the others, the best, of course, is exercise. Taking in different kind of exercises, physical activities

or sports can keep both your body and mind healthy.

1. If you suffer from loss of memory, you _____.

A. should eat cucumbers and cabbages

B. can drink as much wine as possible

C. had better take in fish in your meals

D. may as well take more vitamin C

2. To prevent mental disease from happening, _____.

A. people are advised to take avocados

B. it is best to eat vegetables high in fiber

C. it is better to have more sunflower seeds

D. red wine is the first and best choice

3. Which of the following is the most important for health?

A. Drinking a proper amount of red wine every day.

B. Eating bread made of whole grains.

C. Adding Vitamin C-powered seeds to meals.

D. Taking moderate exercise every day.

4. How many means for health does the author mention in the passage?

A. Six.

B. Seven.

C. Eight.

D. Nine.

5. Which of the following is most suitable for the passage? (① = Para.l ②= Para.2③ = Para.3④ = Para.4

    ⑤= Para. 5⑥ = Para. 6)

A.  B.  C.  D.

题型:单项选择题

如图是20 世纪30 年代英国人创作的漫画《三头怪兽》,其反映的史实是

[ ]

A.三国协约的形成

B.法西斯同盟形成

C.九国齐聚华盛顿

D.英法美三巨头齐聚巴黎和会

题型:单项选择题

在何种项目过程组中不确定因素最高

A.控制

B.执行

C.规划

D.启动

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