1月TOEFL试题

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1月TOEFL试题(精选4篇)

1月TOEFL试题 篇1

Section One: Listening Comprehension 1. (A) She’ll type the man’s paper for him. (B) The computer won’t be available immediately. (C) The man should be more patient. (D) She doesn’t want the man to use her computer. 2. (A) Read the woman’s letter. (B) Visit Jeff in Alaska. (C) Write to Jeff. (D) Mail a letter for the woman. 3. (A) He went to the library twice to look for the book. (B) He already returned the book to a library out of town. (C) He called the library to say the book would be overdue. (D) He couldn’t return the library book because he was away. 4. (A) Where the midterm exam was held. (B) Where she can see the results of the midterm exam. (C) Where she can buy a copy of the chemistry textbook, (D) Where the chemistry study group meets. 5. (A) He’ll ask the driver for help with the luggage. (B) He doesn’t mind driving by himself. (C) He doesn’t have much luggage. (D) He’d like the woman to drive him. 6. (A) The suit is out of style. (B) The suit is more appropriate for the occasion. (C) The woman looks better in blue than in black. (D) The suit doesn’t fit the woman well. 7. (A) Writing her thesis was easier than she thought it would be. (B) She intends to work on her thesis during her vacation. (C) She intentionally chose an easy topic to write about. (D) She plans to spend some time relaxing. 8. (A) He hasn’t had a chance to meet Kathy yet (B) Kathy had already told him the news (C) He didn’t know that Kathy was being moved. (D) His new office will be located in New York. 9. (A) She’d like the man to visit her. (B) She can help the man clean up. (C) She left her room on time this morning. (D) She hasn’t cleaned her room either. 10. (A) He doesn’t know what’s wrong with the computer, (B) The woman misunderstood what he said. (C) The problem is different from what he thought it was (D) The computer cannot be repaired 11. (A) She didn’t see it (B) It had nothing to do with politics. (C) Some people wouldn’t find it in

TOEFL全真试题3-2 篇2

Reading Comprehension

Time: 55 minutes (including the reading of the directions). Now set your clock for 55 minutes.

Questions 1-9

???In science, a theory is a reasonable explanation of observed evnets that are related.

A theory often involves an imaginary model that helps scientists picture the way an

obseved event could could be produced. A good example of this is found in the kinetic

molecular theory, in which gases are pictured as being made up of many small particles

that are in constant motion.

???A useful theoty, in addition to explaining past observations, helps to predict events

that have not as yet been ovserved. After a theory has been publized, scientists design

experiments to test the theory. If observations confirm the scientists predictions, the

theory is supported. If observations do not confirm the predictions, the scientists must

search further. There may be a fault in the experiment, or the theory may have to be

revised or rejected.

???Science involves imagination and creative thinking as well as collecting information

and performing experiments. Facts by thenselves are not science. As the mathematician

Jules Henri Poincare said: “Science is built with facts just as a house is built with

bricks, But a collection of facts cannot be called science any more than a pile of bricks

can be called a house.”

???Most scientists start an investigation by finding out what other scientists have

learned avout a particular problem. After kmown facts have been gathered, the scientist

comes to the part of the investigation that requires considerable imagination. Possible

solutions to the problem are formulated. these possible solutions are called hypotheses.

???In a way, any hypothesis is a leap into the unknown. It extents the scientist s

TOEFL模拟题3-1 篇3

STRUCTURE AND WRITTEN EXPRESSION

1. Cobalt resembles iron and nickel in tensile strength, appearance, ______.

(A) is hard

(B) although hard

(C) has hardness

(D) and hardness

2. _____ who was the first Black woman to run for the office of President of the United

States in 1972.

(A) Shirley S. Chisholm

(B) It was Shirley S. Chisholm

(C) Shirley S. Chisholm was

(D) When Shirley S.Chisholm

3._______ versatile performer, soprano Kathleen Battle has often concluded a program of

art songs and arias with selections from ragtime or popular music .

(A) A

(B) Which

(C) So

(D) Because

4. Before starting on a sea voyage, prudent navigators learn the sea charts, ______and

memorize lighthouse locations to prepare themselves for any conditions they might

encounter.

(A) sailing directions are studied

(B) study the sailing directions

(C) to direct sailing studies

(D) studies direct sailing

5. ______ social nesting birds that built their nests in trees and on cliffs.

(A) The most storks

(B) Most are storks

(C) Most storks are

(D) Storks most

6. Plankton, ______, is the basic foodstuff for everything that lives in the ocean.

(A) comprise both minute marine animals and plants

(B) is the name given to minute marine animals and plants

(C) the collective name for minute marine animals and plants

(D) minute marine animals and plants collectively that

7. The best-known diffuse nebula is the great Orion Nebula, _______ can be seen by the

naked eye.

(A) one

(B) it

(C) which

(D) who

8. Of all the economically important plants, palms have been ______.

(A) the least studied

(B) study the least

(C) study less and less

(D) to study the less

9. Most amphibians hatch from eggs laid in water or moist ground, and begin

2014年1月考试题 篇4

一、选择题

43、再生过程中,再生剂可能出现的问题有除()以外的以下三点

A再生剂流量低B再生剂偏流

C再生剂浓度突然增大D再生剂排出不畅

44、凡是大孔型离子交换树脂一律在型号前加首位字母()

AdBmCDDN45、反洗水偏流能引起()

A树脂床偏斜B压力表指针不稳

C再生剂浓度降低D再生有死角

46、固定床式离子交换器上部进出水装置中,有漏斗式的,安装时漏斗顶部离交换器上封头()mm

A10~20B20~50C50~100D100~20047、交换器内紧固出水装置滤网的螺栓松动会引起()

A树脂中毒B树脂流失C树脂交换人容量降低D 树脂破碎加剧

48、大型固定床式离子交换器本体一般开设人孔()个

A1B2C4D849、用钠离子交换法进行处理时,不能降低水的()

A硬度B碱度C钙离子含量D镁离子含量

50、用食盐溶液作钠型阳离子再生剂时,食盐中纯氯化钠含量不应小于()

A96.5%B85%C80%D75%

51、用钠型阳离子交换法生产的软水是()水

A中性B强酸性C碱性D 弱酸性

52、新树脂在使用前一定要确认一下树脂的()

A强度B交联度C型号D耐热性

53、离子交换树脂在进行湿(干)法装填前,可不必检查离子交换树脂的()

A型号B失水情况C破碎情况D 酸碱性

54、干法装填钠型离子交换树脂,是将树脂装入交换塔后再通入浓度为()的氯化钠溶液

A2%B10%C1%D40%

55、新树脂转型处理中,可以将钠型强酸性阳离子转变成()型的A铁B氢C镁D银

56、在离子交换过程中,离子扩散过程一般可分为()个阶段

A1B5C10D1257、钠型阳离子树脂能够与水中交换的阳离子是()

A碳酸根离子B氢氧根离子C硫酸根离子D钙离子

58、影响反洗强度的因素不包括()

A原水混浊度B树脂粒度C反洗水温度D树脂稳定性

59、不会影响离子交换树脂工作交换容量的因素是()

A原水水质B再生方式C交换流速D 水质分析项目次数

60、再生过程的目的是离子交换树脂()恢复原样

A强度彻底B膨胀性C大部分树脂交换容量D耐热性

61、钠型树脂再生过程中,有时由于正洗不彻底,或再生系统阀门泄漏,使软化后的水中()增多

﹣AFe3+BAL3+CCLDH+

62、为了防止树脂污染,要求进Na交换器的原水悬浮物含量()

A ≤20 mg/LB≤10mg/LC ≤5mg/LD ≤3mg/L

二、判断题

1、在水处理中,即需要除去水中硬度又需要除去水中碱度就可以选择氢钠联合型离子

交换法()

2、阴离子交换法树脂的工作交换容量,随着被处理水的酸性增强而降低()

3、树脂干法装填后,要进行仔细清洗,洗去破碎颗粒及杂质()

4、当钠离子交换树脂在水中遇有钙离子时,水中钙离子被吸附到交换剂上,交换剂由钠

型变成了钙型()

5、树脂层越高,交换过程中交换水流压头损失就越小()

6、反洗可以洗去树脂层中破碎的树脂()

7、反洗时,反洗流速一般控制在50~60m/h之间()

8、再生液浓度越高,再生效果就越好()

9、清洗流速以短时间高流速清洗效果最好()

10、常见的水净化工艺流程中,是先澄清,后沉淀()

11、二氧化碳脱气塔脱气的目的在于:减少二氧化碳对给水系统和锅炉的腐蚀()

12、食盐溶液制备过程是先溶解再澄清,最后过滤()

13、锅炉内水处理是炉外水处理的继续和补充()

14、锅炉内水处理时,投药量越多效果越好()

15、用作软水剂的氢氧化钠加在炉水中时,碳酸盐硬度也消耗碱剂的一部分()

16、加在炉水中的栲胶能使老水垢疏松脱落()

17、在计算再生剂食盐耗量时,一定要考虑食盐的纯度问题()

18、测定水中溶解固形物时,把蒸干的样品放在烘箱内烘干,烘干温度定在105~

110℃()

19、用甲基橙作指示剂滴定终点测的水的碱度PH值较高()

20、表示碱度的字母用A表示()

21、非碳酸盐硬度称为暂时硬度()

22、碳酸盐硬度称为永久硬度()

23、固体物质在水中的溶解度随压力升高而加大()

24、发生物理变化时分子也会发生变化()

25、书写化学反应方程式时,凡是有固体及气体生成物生成时,应在固体分子式后

边加符号↓()

26、分解反应一定是一种物质生成两种不同物质的反应()

27、发生置换反应的条件之一是在金属元素活动顺序表中,排在前边的金属能置换

它后边的金属()

28、有些物质熔化速度慢,可以加入催化剂加速熔化进程()

29、常用的缓冲液还有强酸-弱碱盐型混合液()

30、凡是化合物中有氧的一律叫氧化物()

31、复分解反应能进行彻底的条件之一是两种生成物都溶于水()

32、化学腐蚀是指金属和外部介质直接发生物理变化而引起的腐蚀()

33、按照腐蚀过程的机理,可将金属腐蚀分为化学腐蚀和电化学腐蚀()

34、当金属与非电解质接触中发生的腐蚀容易形成电化学腐蚀()

35、在电化学腐蚀中金属表面可以带正电也可能带负电()

36、全面性腐蚀是指表面上面积较大的腐蚀()

37、小孔腐蚀是属于局部性腐蚀()

38、锅炉氧腐蚀一般都是局部性腐蚀()

39、碱腐蚀一般形式为溃疡型的局部腐蚀()

40、苛性脆化容易发生的部位是锅炉汽泡的铆钉口及胀管口()

三、简述题

40、离子交换器出口水携带树脂的原因是什么?怎样处理?

离子交换器出口水往往携带树脂 , 其原因是 :1.泄水帽脱落 2.由于进水压力过高 , 将花板鼓坏。(3)过滤网被裂。

处理方法是立即使离子交换器停止运行。打开交换器检查泄水帽及花板 , 并及时更换。

41、在固定床离子交换方式中,常见的组合方法有几种?并加说明?

1.单床法 , 在一个管柱式容器中进行离子交换;

2.多床法 , 将离子交换剂分别放在几个管柱容器中 , 串联起来进行离子交换;

3.复床法 , 将不同的离子交换剂放入不同交换器中串联起来交换;

4.混合床法 , 将两种离子交换剂混装在同一交换器中进行离子交换;

5.双层床法 , 将两种离子交换剂利用密度不同装入同一交换器分层交换。

42、离子交换水处理的运行方式有哪些?

1.静态法 : 静态法就是将一定体积的水与一定数量的离子交换剂 , 在同一容器中进行

离子交换的方法;动态法 : 动态法就是将一定体积的水以一定的流速 ,通过离子交换剂层所进行的离子交换的方法;

3.动态法又分为 :①固定床离子交换方式。其中包括单床、多床、复床、混合床、双层床法。

① 连续床离子交换方式。它包括移动床和流动床离子交换法。

43、什么叫部分钠离子交换法?

由于钠型离子交换软水不能降低水中的碱度 , 所以,如果原水的碱度大于2mmol/L时,可以采用部分钠离子交换法以降低碱度。

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