加氢裂化所生产的尾油的相关指数(BMCI)偏高,不符合蒸汽裂解乙烯原料的要求,应()

题型:单项选择题

问题:

加氢裂化所生产的尾油的相关指数(BMCI)偏高,不符合蒸汽裂解乙烯原料的要求,应()

A、提高反应温度,减小氢油比

B、提高反应温度和压力,增大氢油比

C、降低反应温度,减小氢油比

D、降低反应温度,增加氢油比

考点:加氢裂化装置操作工考试中级加氢裂化装置操作工中级加氢裂化装置操作工题库
题型:单项选择题

阅读理解。

     Three rich ladies met every day by the river. They sat there and talked the whole day. Once the three ladies

quarreled. One of them said. "Look, how white and beautiful my hands are!" Another one said, "My hands are

more beautiful." The third one said, "Mine are the most beautiful ones." An old beggar woman came up to them.

"Beautiful ladies," she said, "I'm old and can't work, I'm hungry. Please give me something to eat."

     But the three ladies gave her nothing. They only asked, "Tell me, old woman, which one of us has the most

beautiful hands?"

     A peasant (农民) woman was also sitting by the river. She was poor and her hands were rough be-cause of

hard work. The old woman came up to her and said, "I'm hungry. Please give me something to eat." The peasant

woman took out her only cake she had and gave her a half.

     The old woman ate it and drank some water. Then she took the peasant woman by the hand, brought her

before the rich ladies and said, "Now, I shall tell you whose hands are the most beautiful. The hands of the poor

peasant woman are rough because of work, but they give us food; they are far more beautiful than your hands

which have never done anything."

1. The three ladies _____.

A. had a quarrel every day

B. were rich but unkind

C. had a talk about their hands every day

D. lived by the side of the river

2. The old woman asked for something to eat, _____.

A. but none of the three rich ladies gave anything to her

B. but only one of the three ladies gave her half a cake

C. because she wanted to know whose hands were beautiful

D. because she wanted to know which lady was the richest

3. The peasant woman's hands were not so white as the three ladies' _____.

A. because of the hard work she had done

B. but she was stronger than any of them

C. so she didn't quarrel with the three ladies

D. but she was more beautiful than any of them

4. The old woman said that the peasant woman's hands were more beautiful than the three ladies' because

    _____.

A. she liked dark hands better than white hands

B. the peasant woman gave her half a cake

C. her hands had worked hard to provide food for people

D. the three ladies didn't give her anything to eat

5. Which of the following is the best tide for the passage?

A. Half a Cake

B. A Peasant Woman's Hands

C. The Rich Woman's Hands

D. Smooth (光滑的) Hands and Rough Hands

题型:单项选择题

下列关于分布式数据库系统的叙述中,哪一条是不正确的

A.分布式系统用户的操作与非分布式系统没有什么不同

B.分布式系统的存储结构要比非分布式系统复杂

C.分布式系统和非分布式系统的数据操作在逻辑上没有变化

D.分布式系统的所有问题都是用户级别的

题型:单项选择题

关于体液平衡的描述,不正确的是()

A.女性细胞内液约为体重的35%

B.细胞外液约为体重的20%

C.血浆约为体重的5%

D.无功能性细胞外液占体重的1%~2%

E.各种体液之间是非动态平衡

题型:单项选择题

在中国人中,后降支常常是下列那支血管的主要分支()

A.左室后支

B.前降支

C.回旋支

D.左主干

E.右冠状动脉

题型:单项选择题

男性 * * 全长约

A.10cm左右

B.20cm左右

C.30cm左右

D.30~40cm

E.10~20cm

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