【单选题】
Of the following subjects, are NOT offered to elementary school students.
A. A. mathematics and languages
B. B. politics and business education
C. C. science and social studies
D. D. music and physical education
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相关试题
【单选题】
Formal education in the United States consists of , secondary and higher education.
A. A. kindergarten
B. B. public
C. C. elementary
D. D. private
【单选题】
At present, U. S. exports account for of the world’s total.
A. A. 10%
B. B. 15%
C. C. 20%
D. D. 25%
【单选题】
is not one of the three giants in American automobile industry.
A. A. Ford
B. B. General Motors
C. C. Chrysler
D. D. American Motors
【单选题】
The following statements are all true except .
A. A. Agribusinesses reflect the big, corporate nature of many farm enterprises.
B. B. Agribusinesses maintain a balanced trade pattern between agricultural imports and exports.
C. C. Agribusinesses range from one-family corporations to multinational firms.
D. D. Agribusinesses include a variety of farm businesses and structures.
【单选题】
About of American crops are for export.
A. A. half
B. B. one third
C. C. one fourth
D. D. one fifth
【单选题】
President Johnson tried to build a “Great Society” by introducing various programs like the following except .
A. A. Medicare
B. B. Food Stamps
C. C. Education Initiatives
D. D. Unemployment Pension
【单选题】
The following inventions took place during the “second indThe following inventions took place during the “second industrial revolution” except .
A. A. typewriter
B. B. telephone
C. C. electric light
D. D. refrigerator
【单选题】
The first National Bank of the United States was established with the urge of .
A. A. George Washington
B. B. Thomas Jefferson
C. C. Andrew Jackson
D. D. Alexander Hamilton
【单选题】
Chartered companies were NOT granted the by the British King or Queen.
A. A. political authority
B. B. economic rights
C. C. judicial authority
D. D. diplomatic authority
【单选题】
The modern American economy progressed from to , and eventually, to .
A. A. colonial economy, handcraft economy, industrial economy
B. B. farming economy, handcraft economy, industrial economy
C. C. colonial economy, farming economy, industrial economy
D. D. handcraft economy, farming economy, industrial economy
【单选题】
America produces a major portion of the world’s products in the following fields except .
A. A. machinery
B. B. automobiles
C. C. ore
D. D. chemicals
【单选题】
The President is directly voted into office by .
A. A. all citizens of America
B. B. the citizens over 18 years old
C. C. electors elected by the voters
D. D. the senators and representatives
【单选题】
The Supreme Court is composed of justices.
A. A. six
B. B. seven
C. C. eight
D. D. nine
【单选题】
The terms for a Senator and Representative are and years respectively.
A. A. two, four
B. B. two, three
C. C. two, six
D. D. six, two
【单选题】
According to the Constitution, a candidate for President must be .
A. A. at least 35 years old
B. B. at least a 14 years’ resident of the United States
C. C. born in America
D. D. all of the above
【单选题】
The following except are all powers of the President.
A. A. vetoing any bills passed by Congress
B. B. appointing federal judges when vacancies occur
C. C. making laws
D. D. issuing executive orders
【单选题】
All the following except cannot make legislative proposal.
A. A. the Senator
B. B. the Representative
C. C. the Secretary of State
D. D. the President
【单选题】
The following except are guaranteed in the Bill of Rights.
A. A. freedom of religion
B. B. the right to get into people’s house by police
C. C. freedom of speech and of press
D. D. the right to own one’s weapon if one wishes
【单选题】
The Bill of Rights .
A. A. defines the rights of Congress and the rights of the President
B. B. guarantees citizens of the United States specific individual rights and freedoms
C. C. is part of the Declaration of Independence
D. D. has no relationship with the Constitution
【单选题】
The Constitution of the United States .
A. A. gives the most power to Congress
B. B. gives the most power to the President
C. C. tries to give each branch enough power to balance the others
D. D. gives the most power to the Supreme Court
【单选题】
The U. S. Constitution came into effect in .
A. A. 1787
B. B. 1789
C. C. 1791
D. D. 1793
【单选题】
The Vietnam War was a long-time suffering for Americans, and it continued throughout the terms of Presidents .
A. A. Johnson, Nixon and Ford
B. B. Truman, Eisenhower and Kennedy
C. C. Kennedy, Johnson and Nixon
D. D. Eisenhower, Kennedy and Johnson
【单选题】
President applied New Deal to deal with the problems of the Great Depression.
A. A. Wilson
B. B. Truman
C. C. Roosevelt
D. D. Kennedy
【单选题】
The policy of the United States was at the beginning of the two world wars.
A. A. neutrality
B. B. full involvement
C. C. partial involvement
D. D. appeasement
【单选题】
Abraham Lincoln issued to grant freedom to all slaves.
A. A. Declaration of Independence
B. B. Constitution
C. C. Emancipation Proclamation
D. D. Bill of Rights
【单选题】
In May 1775, was held in Philadelphia and began to assume the functions of a national government.
A. A. the First Continental Congress
B. B. the Second Continental Congress
C. C. the Boston Tea Party
D. D. the Congress of Confederation
【单选题】
The first shots of the American dependence were fired in .
A. A. Concord
B. B. Lexington
C. C. Philadelphia
D. D. Boston
【单选题】
“No taxation without representation” was the rallying slogan of .
A. A. the settlers of Virginia
B. B. the people of Pennsylvania
C. C. the colonists in New England
D. D. the people of the 13 colonies
【单选题】
The Seven Years’ War occurred between the .
A. A. French and American Indians
B. B. French and Spaniards
C. C. French and British
D. D. British and American Indians
【单选题】
Pilgrim Fathers are a group of who came to America to avoid persecution in England.
A. A. Protestants
B. B. Puritans
C. C. Catholics
D. D. Christians
【单选题】
The first successful English colony in North America was founded at in .
A. A. Jamestown, Louisiana
B. B. Boston, Massachusetts
C. C. Jamestown, Virginia
D. D. Plymouth, Georgia
【单选题】
The characteristic of dominant American culture is .
A. A. English-speaking, northern European, Roman Catholic and middle-class
B. B. English-speaking, western European, Roman Catholic and upper-class
C. C. English-speaking, northern European, Protestant and upper-class
D. D. English-speaking, western European, Protestant and middle-class
【单选题】
The ImmiWar of Ingrants Act of 1924 restricted the further immigration into the United States, particularly from .
A. A. Europe
B. B. Asia
C. C. Africa
D. D. South America
【单选题】
The largest minority in the United States is the .
A. A. Pacific Islanders
B. B. Blacks
C. C. Native Americans
D. D. Asians
【单选题】
The native Alaskan population includes the following except the .
A. A. Indians
B. B. Eskimos
C. C. Aleuts
D. D. Blacks
【单选题】
is located on the U. S. –Canadian border between Lake Erie and Lake Ontario.
A. A. Yellowstone National Park
B. B. The Grand Canyon
C. C. Niagara Falls
D. D. The Great Salt Lake
【单选题】
Some of the world famous universities like Harvard, Yale and MIT are located .
A. A. in the South
B. B. along the Pacific Coast
C. C. in New England
D. D. in the Midwest
【单选题】
The largest river in the U. S. is .
A. A. the Missouri River
B. B. the Mississippi River
C. C. the Ohio River
D. D. the Colorado River
【单选题】
The U. S. lies in North America, with Canada to the north, Mexico to the south, the Atlantic to its and the Pacific to its .
A. A. northern, east, west
B. B. central, east, west
C. C. southern, west, east
D. D. western, east, west
【单选题】
The state of is the largest in area of all the states.
A. A. Alaska
B. B. Hawaii
C. C. Texas
D. D. Florid
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【单选题】
职业行为规范首先要从 ___这一职业道德开始
A. 诚实守信、办事公道
B. 工作认真负责
C. 认真学习专业知识
D. 爱岗敬业、忠于职守
【单选题】
___不应算是焊工的职业守则
A. 参加社会公益活动
B. 遵守企业的有关规章制度
C. 重视岗位技能训练
D. 谦虚谨慎，团结合作
【单选题】
在910℃以下的体心立方晶格的铁称为___
A. ω-Fe
B. σ-Fe
C. α-Fe
D. γ-Fe
【单选题】
在910—1390℃的面心立方晶格的铁称为___
A. ω-Fe
B. σ-Fe
C. α-Fe
D. γ-Fe
【单选题】
铁素体是少量的 ___和其他合金元素固溶于α-Fe中的固溶体
【单选题】
奥氏体是碳和其他合金元素在 ___中的固溶体，他的一个特点是没有磁性
A. α-Fe
B. γ-Fe
C. δ-Fe
D. б-Fe
【单选题】
Fe-C合金平衡状态图中的ES线，表示碳质量分数高于0.8%的钢在缓慢冷却时，由奥氏体开始析出 ___的温度，简称Acm线
A. 马氏体
B. 珠光体
C. 铁素体
D. 渗碳体
【单选题】
低碳钢的室温组织为珠光体加___
A. 铁素体
B. 渗碳体
C. 奥氏体
D. 莱氏体
【单选题】
将钢加热到A3或Acm以上50～70℃，保温后在静止的空气中冷却的热处理方法称为___
【单选题】
将钢加热到A3以上或A1左右一定温度，保温后缓慢（一般随炉冷却）而均匀冷却的热处理方法称为退火，他可以___
A. 提高钢的硬度、提高塑性
B. 降低钢的硬度、提高塑性
C. 提高钢的硬度、降低塑性
D. 降低钢的硬度、降低塑性
【单选题】
塑性的主要指标中不应该包括___
A. 伸长率
B. 断面收缩率
C. 冷弯角
D. 屈服点
【单选题】
碳钢中除含有 ___元素外，还有少量的硅、锰、硫、磷等杂质
A. 铁、碳
B. 铬、碳
C. 钼、碳
D. 镍、碳
【单选题】
中碳钢中，碳质量分数为___
A. 0.25%--0.60%
B. 0.25%--0.45%
C. 0.45%--0.60%
D. 0.60%--0.80%
【单选题】
凡方向不随时间变化的电流就是直流电流，直流电流用字母___表示
【单选题】
导体电阻的大小与物质的导电性能即___及导体的长度成正比，而与导体的截面积成反比
【单选题】
在并联电路中的总电阻值小于各并联电阻值，并联电阻越多其总电阻越小，电路中的总电流___
【单选题】
用右手螺旋法则判断载流直导线周围磁场方向时，以右手拇指竖起表示电流方向，其余四指弯曲，则四指弯曲的指向就是 ___的方向
【单选题】
保护接地的接地电阻一般要小于___Ω
A. 4Ω
B. 10Ω
C. 15Ω
D. 20Ω
【单选题】
Mn是 ___的元素符号，Si是( )的元素符号
A. 锰，硅
B. 硅，锰
C. 钼，硫
D. 镁，钛
【单选题】
Nb是 ___的元素符号，Ti是( )的元素符号
【单选题】
对于水下或其他由于触电会导致严重二次事故的环境，国际电工标准会规定安全电压为 ___
A. 24V以下
B. 12V以下
C. 6V以下
D. 2.5V以下
【单选题】
在用碱性焊条电弧焊时，药皮中的 ___和氢在高温下会产生氟化氢，氟化氢是一种具有刺激气味的无色气体
A. 大理石
B. 金红石
C. 长石
D. 萤石
【单选题】
焊工在有积水的地面焊接、切割时，应穿经过 ___耐压试验合格的防水橡胶鞋
A. 4000V
B. 5000V
C. 6000V
D. 7000V
【单选题】
焊前应对焊割场地进行安全检查，但 ___不属于场地安全检查内容
A. 易燃易爆物是否采取安全措施
B. 有无水源与消防灭火器材
C. 气瓶与明火热源的距离是否符合要求
D. 地面是否干净卫生
【单选题】
施焊前，焊工应对设备进行安全检查，但 ___不属于设备安全检查的内容
A. 机壳保护接地或接零是否可靠
B. 电焊机一次电源线的绝缘是否完好
C. 电焊钳重不重
D. 电焊机输入接线柱有无防护隔离罩
【单选题】
电焊钳在使用前应进行检查，___是检查内容之一
A. 热膨胀性能
B. 导磁性能
C. 抗氧化性能
D. 装换焊条是否方便
【单选题】
焊接前焊工应对所使用的角向磨光机进行安全检查，但___不必检查
A. 角向磨光机内部绝缘电阻值
B. 砂轮转动是否正常
C. 有没有漏电现象
D. 砂轮片是否已经紧固牢固
【单选题】
低合金钢焊条型号例如E5515-G中，第三位数字表示___
A. 熔敷金属抗拉强度最小值
B. 焊条适用的焊接位置
C. 焊条药皮类型及焊接电流种类
D. 熔敷金属的化学成分分类
【单选题】
CO2焊用的CO2气体纯度，一般要求不低于 ___
A. 98%
B. 98.5%
C. 99%
D. 99.5%
【单选题】
___是一种理想的钨极氩弧焊的电极材料，也是我国目前建议尽量采用的钨极
【单选题】
高强钢18MnMoNb的构件焊接时，焊条采用J707，定位焊时，焊条应采用 ___
A. J557
B. R207
C. R307
D. J707
【单选题】
下列选项中 ___不是焊前预热的作用与目的
A. 降低焊后冷却速度，降低淬硬倾向
B. 提高奥氏体不锈钢的耐腐蚀性能
C. 有利于扩散氢逸出
D. 可以减小焊接应力
【单选题】
手工钨极氩弧焊设备中没有 ___
A. 控制系统
B. 行走机构
C. 气路系统
D. 水路系统
【单选题】
氩弧焊机供气系统没有 ___
A. 氩气瓶
B. 减压器
C. 预热器
D. 电磁气阀
【单选题】
氩气瓶外表漆成 ___色并标有深绿色“氩”字
【单选题】
CO2气瓶瓶体表面漆成 ___色，并漆有“液态二氧化碳”黑色字样
【单选题】
焊条电弧焊Y形坡口的坡口角度一般为 ___
A. 30°
B. 60°
C. 80°
D. 90°
【单选题】
厚度12mm钢板对接，焊条电弧焊立焊，单面焊双面成形时，预置反变形量一般为___
A. 0°~1°
B. 3°~4°
C. 5°~6°
D. 7°~8°
【单选题】
焊条电弧焊立焊操作时，发现椭圆形熔池下部边缘由比较平直轮廓变成鼓肚变圆时，表示熔池温度已稍高或过高，应立即灭弧，降低熔池温度，以避免产生___
【单选题】
与焊条电弧焊相比， ___不是自动埋弧焊的缺点
A. 不适合焊接薄板
B. 对气孔敏感性较大
C. 辅助准备工作量大
D. 焊工劳动强度大
