热门试题:
[单项选择]下列有关索引的叙述中不正确的是
A. 一个基本表中可以建立一个或多个索引
B. 一个基本表中可以建立一个或多个聚簇索引
C. 一个基本袁中可以建立一个或多个非聚簇索引
D. 建立聚簇索引后，更新数列时会导致数据物理顺序变更
[单选题]钢管扣件式外脚手、钢管扣件混合式脚手和门型框架脚手都有（ ）组成。
A.大横杆
B.小横杆
C.水平拉杆
D.连墙杆
[单选题]电力网中，当电感元件与电容元件发生串联且感抗等于容抗时，就会发生（ ）谐振现象。
A. 电流
B. 电压
C. 铁磁
D. 磁场
[多选题]下列哪些情况可以使人群易感性增加？
A.进入疫区
B.新生人口增加
C.部队新兵入伍
D.病后获得免疫
[单项选择]军团菌在人与人之间传播方式主要是( )
A. 水
B. 昆虫媒介
C. 气溶胶
D. 土壤
E. 食物
[判断题]《广深港高速铁路跨境旅客运输组织规则》规定：退票费按元计算，不足一元的部分四舍五入。
A.正确
B.错误
[单选题]Cache的中文译名是( )。
A. 缓冲器
B. 只读存储器
C. 高速缓冲存储器
D. 可编程只读存储器
[填空题]实验效果检测的科学性，是指（）要科学，（）要科学，（）也要科学。
[填空题]调车指挥人接到车站值班员（助理值班员（内勤））客运作业完毕的通知后，应指派调车人员确认车底车门关闭，站台无侵限物并具备（ ）后，方准按规定进行作业。
[填空题]在细菌中，存在着4种不同的糖被形式，即（）、（）、（）和（）。
[单项选择]A. Since last year. B. For a few days.
C. For a few hours. D. For several weeks.
[单选题]依据《水污染防治法》，生活饮用水地表水源二级保护区内的水质，适用()。
A.国家《地面水环境质量标准》Ⅰ类标准
B.国家《地面水环境质量标准》Ⅱ类标准
C.国家《地面水环境质量标准》Ⅲ类标准
D.国家《地面水环境质量标准》Ⅳ类标准
[判断题]河道砂石属于国有资源,未经水行政主管部门许可,任何
单位和个人不得从事河道采砂活动。 ( )
A.正确
B.错误
[单选题]20～30mm
A.20～30mm
B.20～50mm
C.30～40mm
D.30～50mm
[单选题]( )可分为熔焊、压焊、钎焊三大类。
A.焊接方法
B.气焊
C.电焊
D.熔焊
[单选题]1937年7月7日,()事变爆发,全国抗日战争由此开始。
A.九·一八
B.华北
C.卢沟桥
D.八·一三
[多选题]钢筋按其所起的作用分类,一般有( )。
A.受力筋
B.架立筋
C.箍筋
D.分布筋
E.主筋
[判断题]对于煤气中毒患者，应首先将中毒者抬出危险区域。（ ）
A.正确
B.错误
[简答题]The plight of the aged has come to be regarded as a major social problem in the United States. In a sense, the elderly (conventionally, those aged sixty-five and over) are a "newly-discovered" minority group. Like other minority groups, the old are subjected to job discrimination; they suffer nigh rates of poverty; they face prejudice founded on inaccurate stereotypes; they are excluded from the mainstream of American life on the basis of supposed group characteristics; and they are offered few meaningful roles in their society. In addition, the aged may face such problems as nigh rates of victimization by criminals, a heavy, burden of chronic illness and medical expenses, and psychological problems that result from their loss of independence and their sense of being unwanted.
In America, childhood is romanticized, youth is idolized, middle age does the work, wields the power and pays the bills, and old age gets little or nothing for what it has already done. For many elderly
[判断题]工作时人身与10kV带电体的距离为0.35m时，应采取带电作业方式。
A.正确
B.错误
[简答题]part 1School
How long have you been a student
What do you enjoy most about your studies
Why did you choose this university
What is your major in your university Why did you choose it
Why did you choose this school？
How long have you been a college student
Tell me something about your campus life
Do you prefer to be a student or to be a working person Why
[单选题]依据《职业病防治法》，（ ）、劳动保障行政部门依照本法和国务院确定的职责，负责全国职业病防治的监督管理工作。国务院有关部门在各自的职责范围内负责职业病防治的有关监督管理工作。
A.国务院卫生行政部门
B.国务院应急管理部
C.国务院
[单选题]（第二十三条）牵引吊升作业时，吊臂及转移线路下方( )站人。( )
A.严禁
B.可以
[单选题]动土开挖时，使用的材料、挖出的泥土应堆放在距坑、槽、井、沟边沿至少1米处，堆土高度不得大于( )米
A.1
B.1.5
C.1.2
D.1.8
[判断题]生产经营单位的主要负责人对本单位的安全生产工作部分负责（）。
A.正确
B.错误
[简答题]在有感应电压的线路上测量绝缘时，应采取什么安全措施？什么情况下，严禁测量线路绝缘？
[单项选择]矿山安全技术
矿井风量按井下同时工作的最多人数计算，每人每分钟供风量不少于( )。
A. 1m3
B. 2m3
C. 3m3
D. 4m3
[单项选择]从伦理上说，医患关系是一种（）
A. 陌生人之间的关系
B. 商品关系
C. 主从关系
D. 医疗契约关系
E. 信托关系
[多项选择]Suppose you are a student of Beijing University. You went to Guangzhou last month and unfortunately lost your handbag there with your student card, identification card and 3 000 yuan in it. When you got back to Beijing, you received a parcel in which the two cards and the handbag are contained, and a bill of 3 000 yuan. From the address of the writer, you know be is Liu Ming, a sophomore of the Mechanics Department of X University. Now you want to write a letter of commendation to Liu Ming.
You should write approximately 100 words. Do not sign your own name at the end of your letter. Use "Wang Fang" instead. You do not need to write the address.
[单选题]地陪带领游客到餐厅用第一餐时,应告知他们( ),以免产生误会。
A.菜肴的主要特色
B.酒水的主要品种
C.餐厅的主要设施
D.用餐的有关规定
[判断题]《旅客列车给水工作管理办法》第三十四条规定，总公司定期公布各铁路运输企业、列车担当单位、给水车站给水联系电话（格式见附件3），公布的联系电话应保证24有人接听。如有变化，应及时通知相关单位，报局、总公司备案。
A.正确
B.错误
[填空题]常规有性杂交育种中杂交后代选择方法有（）、（）和（）。
[单选题]( )强烈的神经毒物,对粘膜有强烈刺激作用。(1.0分)
A.氨气
B.硫化氢
C.氮气
[多选题]( )是活性污泥培养成熟前出现的。
A.豆形虫;
B.漫游虫;
C.钟虫;
D.波多虫。
[单项选择]家长对于托儿所、幼儿园的心态可分为几个阶段，其中“对婴幼儿教育的关注程度呈上升趋势，有接受教育指导的强烈愿望”属于（）。
A. 希求期
B. 忽略期
C. 需求期
D. 渴求期
[单项选择]Salt is a principal wicked substance. Salt, sodium chloride (氯化钠), 40 percent of which is sodium (钠), is an element essential to human body. But sodium also boosts blood pressure. It makes the body retain fluids; greater fluid retention increases total blood volume, and this increase raises blood pressure. Where salt is used freely, a large proportion of the population develops chronic high blood pressure, which is a primary factor in heart disease and stroke. Farmers in northern Japan traditionally preserve their food with salt. They consume as much as six teaspoons a day-and 40 percent of them have high blood pressure. Among the Eskimos. of Greenland, however, who consume little salt, high blood pressure is almost unheard of.
The body of an adult needs only about 200 milligrams of sodium a day -- the amount in 500 milligrams, or 1/10 of teaspoon, of salt. But the average American consumes about 12,000 milligrams, or more than two teaspoons, of salt a day -- which supplies 24 t
A. 8,000 milligrams.
B. 30,000 milligrams.
C. 12,000 milligrams.
D. 5,000 milligrams.
[判断题]电气设备的保护零线与工作零线合一设置的系统,称为 TN—C 系统。
A.正确
B.错误
[单选题] 第897题配电线路通过耕地时,接地体应埋设在耕作深度以下,且不宜小于( )m 。
A.1
B.0.8
C.0.7
D.0.6
[多项选择]下列选项中，属于唯物主义历史形态的有（）
A. 朴素唯物主义
B. 庸俗唯物主义
C. 形而上学唯物主义
D. 辩证唯物主义
E. 自然唯物主义
