【单选题】
配1m3混凝土，需水泥300kg，水180kg，现场配制时加水量为150kg，混凝土的实际水灰比为___
A. 0.6
B. 0.55
C. 0.5
D. 无法确定
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相关试题
【单选题】
分计筛余百分率（%）a1为___
A. 4.5
B. 10.5
C. 20.5
D. 24.5
【单选题】
分计筛余百分率（%）a2为___
A. 4.5
B. 10.5
C. 20.5
D. 24.5
【单选题】
分计筛余百分率（%）a3为___
A. 4.5
B. 10.5
C. 20.5
D. 24.5
【单选题】
分计筛余百分率（%）a4为___
A. 4.5
B. 10.5
C. 20.5
D. 24.5
【单选题】
分计筛余百分率（%）a6为___
A. 14.5
B. 10.5
C. 20.5
D. 24.5
【单选题】
累计筛余百分率（%）A2为___
A. 15
B. 35.5
C. 60
D. 80.5
【单选题】
累计筛余百分率（%）A3为___
A. 15
B. 35.5
C. 60
D. 80.5
【单选题】
累计筛余百分率（%）A4为___
A. 15
B. 35.5
C. 60
D. 80.5
【单选题】
累计筛余百分率（%）A5为___
A. 15
B. 35.5
C. 60
D. 80.5
【单选题】
累计筛余百分率（%）A6为___
A. 35.5
B. 95
C. 60
D. 80.5
【单选题】
细度模数为___
A. 2.66
B. 2.56
C. 2.76
D. 2.67
【单选题】
该砼28d的标准立方体抗压强度___
A. 32.3
B. 31.8
C. 31.3
D. 32.1
【单选题】
该砼的W/C___
A. 0.55
B. 0.65
C. 0.45
D. 0.50
【单选题】
水泥的实际强度为___
A. 35
B. 35.8
C. 32.5
D. 36
【单选题】
要提高混合砂浆保水性，渗入___经济合理。
【单选题】
砂浆中加入其他掺和剂的主要原因是___
A. 提高强度
B. 改善和易性，降低成本
C. 粘聚性
D. 改善保水性
【单选题】
确定混凝土配制强度___
A. 35MPa
B. 42.9MPa
C. 45MPa
D. 52.5MPa
【单选题】
确定W/C___
A. 0.36
B. 0.40
C. 0.46
D. 0.65
【单选题】
计算水泥用量___
A. 424kg
B. 414kg
C. 434kg
D. 444kg
【单选题】
计算粗骨料用量___
A. 1262 kg
B. 1256 kg
C. 1152kg
D. 1162kg
【单选题】
计算细骨料用量___
A. 499 kg
B. 599kg
C. 650 kg
D. 699 kg
【单选题】
普通碳素结构钢等级划分的依据是___
A. 化学成分
B. 力学性质
C. 工艺性质
D. 化学成分、力学性质、工艺性质
【单选题】
热轧钢筋按力学性能分为四级，随着级别增大，钢筋的___
A. 强度增高、伸长率增大
B. 强度增高、伸长率降低
C. 强度降低、伸长率增大
D. 强度降低、伸长率降低
【单选题】
该钢筋的断后伸长率δ5___
A. 13.5%
B. 25%
C. 26%
D. 27%
【单选题】
该钢筋的屈强比___
A. 0.63
B. 0.315
C. 0.36
D. 0.66
【单选题】
石灰在使用前一般要进行陈伏，这是为了 ___
A. 有利于结晶
B. 蒸发多余水分
C. 消除过火石灰的危害
D. 降低发热量
【单选题】
下列关于建筑石膏性质说法有误的一项是 ___
A. 耐水性、抗冻性都非常好
B. 凝固时体积微膨胀
C. 防火性好
D. 凝结硬化快
【单选题】
下列各组胶凝材料均是气硬性胶凝材料的是 ___
A. 石灰、石膏、水玻璃
B. 石灰、水泥、水玻璃
C. 石膏、水泥、水玻璃
D. 石灰、水泥、石膏
【单选题】
石灰浆的硬化包括干燥硬化、结晶硬化、碳酸化硬化，其中，对硬度增长起 主导作用的是___
A. 干燥硬化
B. 结晶硬化
C. 碳酸化硬化
D. 以上都不是
【单选题】
建筑石膏的主要成份是 ___
A. 碳酸钙
B. 硫酸钙
C. 碳酸镁
D. 硫酸镁
【单选题】
用量最多、用途最广的石膏是 ___。
A. 建筑石膏
B. 粉刷石膏
C. 模型石膏
D. 高强石膏
【单选题】
石灰应用中，在___操作时应进行“陈伏”
【单选题】
石灰熟化时体积___
A. 膨胀大
B. 收缩大
C. 无变化
D. 微量膨胀
【单选题】
建筑石膏的优点是___
A. 保水性差
B. 耐水性差
C. 保温、隔热性好
D. 自重大
【单选题】
下列沥青品种中，___是改良沥青
A. 煤沥青
B. 建筑石油沥青
C. 道路石油沥青
D. 沥青胶
【单选题】
随着时间的延长，石油沥青中组成逐渐递变的顺序是___
A. 油分→树脂→地沥青质
B. 树脂→油分→地沥青质
C. 油分→地沥青质→树脂
D. 地沥青质→树脂→油分
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【单选题】
Of the following, is considered Herman Melville’s masterpiece.
A. A. The Last of the Mohicans
B. B. The Legend of Sleepy Hollow
C. C. Moby Dick
D. D. Daisy Miller
【单选题】
Of the following, is NOT Nathaniel Hawthorne’s work.
A. A. The Scarlet Letter
B. B. The House of the Seven Gables
C. C. The Marble Faun
D. D. Nature
【单选题】
is regarded as “the father of American literature”.
A. A. James Fennimore Cooper
B. B. Ralph Waldo
C. C. Thomas Jefferson
D. D. Washington Irving
【单选题】
Of the following writers, are from the Colonial and Revolutionary Periods.
A. A. Benjamin Franklin & Edgar Ellen Poe
B. B. Edgar Ellen Poe & Jonathan Edwards
C. C. Benjamin Franklin & Jonathan Edwards
D. D. Edgar Ellen Poe & Washington Irving
【单选题】
The National Day of the United States falls on .
A. A. June 4th
B. B. July 4th
C. C. June 14th
D. D. July 14th
【单选题】
Of the following, is NOT among the three major radio and TV networks in America.
A. A. the National Broadcasting System (NBS)
B. B. the Public Broadcasting Service (PBS)
C. C. the Columbia Broadcasting System (CBS)
D. D. the American Broadcasting System (ABS)
【单选题】
is sold especially to the upper or upper-middle class and it has a reputation for its serious attitude and great bulk.
A. A. The Washington Post
B. B. The New York Times
C. C. Los Angeles Times
D. D. New York Daily News
【单选题】
Of the following universities, has NOT cultivated any American President yet.
A. A. Harvard University
B. B. Massachusetts Institute of Technology
C. C. Princeton University
D. D. Yale University
【单选题】
To get a bachelor’s degree, all undergraduate students are required to do the following except .
A. A. attending lectures and completing assignments
B. B. passing examinations
C. C. working for communities
D. D. earning a certain number of credits
【单选题】
Of the following, is NOT the responsibility of the board of trustees in U. S. institutions.
A. A. choosing the president
B. B. establishing policies for administrators and faculty
C. C. approving budget and other financial project
D. D. decide which student to enroll
【单选题】
Of the following, are NOT among the categories of American higher education.
A. A. universities and colleges
B. B. research institutions
C. C. technical institutions
D. D. community colleges
【单选题】
Higher education in the United States began with the founding of
A. A. Yale University
B. B. Harvard University
C. C. Princeton University
D. D. New York University
【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
【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
