出自:佳木斯大学语言治疗学

脱乙烷塔塔顶的关键组分为( )。
·丙烷;
·丙烯;
·乙烷;
·乙烯。
液相均相催化氧化在工艺上的优越性有( )。
·反应条件温和;
·反应热方便除去;
·反应温度容易控制;
·反应设备结构简单。
在银催化剂上乙烯用空气或纯氧氧化,能够得到哪些产物( )。
·二氧化碳;
·环氧乙烷;
·水;
·甲醛。
深冷分离流程有( )。
·顺序分离流程;
·前脱乙烷流程;
·前脱丙烷流程;
·前脱丁烷流程。
工业上已用于苯烷基化工艺的酸性催化剂主要有( )。
·酸性卤化物的络合物;
·磷酸/硅藻土;
·BF3/硅藻土;
·ZSM-5分子筛催化剂。
原油在蒸馏前,一般先经过( )处理。
·脱盐、脱水
·脱硫、脱盐
·脱蜡、脱水
·脱盐、脱硫
石油中所含烃类有烷烃、( )和芳香烃。
·烯烃
·环烷烃
·炔烃
·二烯烃
烃类热裂解中二次反应有( )、烯烃环化和缩合、烯烃的加氢和脱氢、烃分解生成碳。
·芳烃缩合
·芳构化反应
·烷基化反应
·烯烃的裂解
催化裂化目的是将( )加工成辛烷值较高的汽油等轻质原料。
·减压渣油
·常压馏分油
·润滑油
·重柴油
直链烷烃在催化裂化条件下,主要发生的化学变化有:碳链的断裂和脱氢反应、异构化反应、环烷化和芳构化反应( )等反应。
·烷基化反应
·叠合、脱氢缩合
·聚合反应
·脂化反应
基本有机化学工业中石油加工方法有( )、催化裂化、催化重整和加氢裂化。
·烷基化反应
·常减压蒸馏
·催化氧化
·脂化反应
基本有机化学工业中石油加工方法有常减压蒸馏、催化裂化、催化重整( )。
·烷基化反应
·加氢裂化
·催化氧化
·脂化反应
工业上采用的催化裂化装置主要有以硅酸铝为催化剂的( )和以高活性稀土Y分子筛为催化剂的提升管催化裂化两种。
·流化床催化裂化
·加氢裂化
·催化氧化
·脂化反应
催化重整是使 ( )经过化学加工变成富含芳烃的高辛烷值汽油的过程,现在该法不仅用于生产高辛烷值汽油,且已成为生产芳烃 的一个重要来源。
·常压蒸馏所的轻汽油馏分
·减压蒸馏所的柴油
·常压渣油
·减压渣油
催化重整是使原油常压蒸馏所得的轻汽油馏分经过化学加工变成富含( )的高辛烷值汽油的过程。
·芳烃
·甲烷
·环氧乙烷
·脂肪酸
( )不仅用于生产高辛烷值汽油,且已成为生产芳烃的一个重要来源。
·常减压蒸馏
·催化裂化
·催化重整
·催化氧化
自由基连锁反应分为( )、链传递、链终止三个阶段。
·链引发
·链终止
·链增长
·链裂解
( )是用于表征柴油等重质油馏分油中烃组分的结构特性。
·PONA
·芳烃指数
·特性因数
·原料含烃量
特性因素是用作反映( )等油品的化学组成特性的一种因素。
·柴油等重质油
·石脑油、轻柴油等油品
·润滑油等重质油
·航煤等重质油
球形分子氩的偏心因子ω为( )
·1
·0
·< 0
·>0
纯物质临界点时,其对比压力Pr( )
·= 0
·< 0
·> 0
·=1
稳定流动体系的能量积累为零,熵的积累则 ( )
·大于零
·不确定
·小于零
·等于零
过热蒸汽通过绝热可逆膨胀,对外做功为,经计算此过程的理想功为,则( )
·大于
·小于
·相等
·不能确定
无法脱除少量CO的方法是:( )。
·铜氨液吸收法
·活化MDEA法
·液氮洗涤法
·甲烷化法
下述反应中属于加氢反应类型的是( )。
·烃类裂解气净化脱除乙炔
·以乙苯为原料生产苯乙烯
·以丙烯为原料生产丙烯腈
·CO水蒸气变换为CO2
It is a _______ and difficult time for me.
·frustrating
·frustration
·frustrated
·frustrate
The ________ girl is very popular iher school.
·stylish
·style
·styles
·styling
– CaI help you –__________
·That’s not necessary, but thank you all the same.
·No, I won’t.
·Of course.
·Well, I suggest you not.
The object of my visit was to consult your uncle as to _____ I could learEnglish better.( )
·that
·how
·which
·/
The new editioof this book is _____ expensive thathe old one .
·fewer
·more much
·less
·a little
Ia developed country, people will perhaps be unemployed if the birthrate _____________.
·goes up
·goes down
·remains stable
·is out of control
Attending parties occasionally ca________ up your life.
·add
·color
·spice
·get
He stumbled ____________ the staircase and hurt his leg.
·in
·to
·on
·at
He seems so honest and genuine and my every ____________ says he.s not.
·instinctive
·instinctively
·instant
·instinct
Industrial cities such as Chicago and Detroit have severely ____ the waters of the Great Lakes.( )
·pollutions
·polluting
·pollutes
·polluted
_____ the hard winter, the roses iour gardeare still alive.( )
·Ispite
·Despite of
·Ispite of
·Idespite of
Wow! This is a marvelous room! I’ve never knowyou’re so artistic. _________
·Great, I am very art-conscious.
·Don’t mentioit.
·Thanks for your compliments.
·It’s fine.
His coming won’t make any difference ____________ the way we conduct our affairs.
·for
·with
·to
·in
I showed him the pictures I ______ of the animals the day before, and told him the stories.
·was taking
·had taken
·have taken
·was taken
What is the best title for the passage（）
·Caring for the Old
·Housing of the Old
·Problems of the Old
·Personalities of the Old
Which of the following is closest imeaning to the word “pressing” (para. 1)( )
·independen
·essential
·automatic
·urgent
Which of the following statements will the author probably agree with( )
·It is mistakekindness to encourage the old to look for a job.
·Young people sympathy and affection, caring for the old castill be difficult.
·Evewith sympathy and affection, caring for the old castill be difficult.
·Younger relatives often, but not always feel sympathy and affectiofor the old.
Advice about bringing up families is mentioned ithe second paragraph to show that _____.( )
·it is the first essential to care for the old
·it is easier to care for the young thathe old
·goodwill and skill are required icaring for the old
·there are not enough suggestions about caring for the old
To solve the problems of the old, ________________.( )
·old people should live iaindependent home
·old people should live with younger relatives
·younger relatives should visit the old occasionally
·younger relatives should play a key role
What is the solutioto the problem discussed ithe passage( )
·Administrators should spend more time with the students and take up the responsibility to guide them.
·Presidents and faculty members should arouse the students’ cultural and intellectual curiosity.
·Students should understand that the presidents have to take into consideratiothe survival of the university.
·All the people concerned should make efforts to change the present society into one with no fear and isolation.
What cabe said of the modersociety( )
·Students ithis society have no sense of values.
·It’s so realistic that people no longer have dreams.
·People ignore the leadership of the government.
·It’s a society that quite breaks away from tradition.
Which of the following is TRUE of the present university presidents according to the passage( )
·They tend to neglect the students.
·They ignore the students they meet.
·They avoid notice from people around them.
·They consider themselves superior to students.
Which of the following should be the most important to university administrators according to the writer( )
·They are easily accessible to students.
·They readily compromise with students.
·They develop meaningful relations with students.
·They cherish their dream about higher education.
What is the major concerof university presidents now according to the passage( )
·University students.
·Vague shadows.
·Finance.
·Depersonalization.
Will you play _____ games with me( )
·much
·some
·any
·a little
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