热门试题:
[单项选择]某男,考虑变应性鼻炎,首选的检查是()
A. 鼻分泌物特异性IgE抗体测定
B. 变应原激发试验
C. 病毒壳抗原-免疫球蛋白的A抗体测定
D. 血浆中P物质测定
E. 激素试验治疗
[单选题]在飞行活动中,导致飞行疲劳的三个主要因素是
A.昼夜生物节律扰乱、睡眠缺失以及工作负荷过大;
B.工作负荷过大、心理状态差、身体状态不好;
C.座舱噪音、座舱缺氧、人际关系不良。
[单项选择]3.5英寸1.44MB软盘的每个扇区的容量是______。
A. 128 Bytes
B. 256 Bytes
C. 512 Bytes
D. 1024 Bytes
[单项选择]建筑面积大于( )m2的人防工程,其消防用电应按一级负荷要求供电。
A. 2000
B. 3000
C. 4000
D. 5000
[判断题]在安全色标中用绿色表示安全、通过、允许、工作。( )
A.正确
B.错误
[单项选择]物理教师李强结合课程教学内容,查阅资料,利用现有资源自制实验器材,开设了不少探究性物理实验,这表明李老师具有()。
A. 全面发展理念
B. 和谐发展理念
C. 长善救失意识
D. 课程开发意识
[单选题]“桂林山水甲天下”,桂林山水之所以优美的最主要原因是( )。
A.桂林属于岩溶地貌
B.桂林属于高山地形
C.桂林的年降雨量特别大
D.桂林的植物种类丰富
[单选题]货币能够执行价值尺度的职能,因为货币( )。
A.有特殊的使用价值
B.是商品交换的媒介
C.自身也有价值
D.可作为支付手段
[单选题]调整和规范国家行政关系的法律规范的总称是( )。
A.行政法
B.宪法
C.经济法
D.刑法
[单项选择]I don't think the blouse need any ______ . It fits you perfectly.
A. revision
B. variation
C. change
D. alteration
[判断题] 停电时应拉开隔离开关(刀闸),手车开关应拉至试验或检修位置,使停电的线路和设备两端都有明显断开点。( )
A.正确
B.错误
[填空题]充分反映了秦代陶塑工艺美术的卓越技艺的是陕西临潼发掘的()。
[单项选择]一个大中型建设项目是由多个()组成的。
A. 单项工程
B. 单体工程
C. 单位工程
D. 分部工程
[单选题]矿井完好的矿灯总数,至少应当比经常用灯的总人数多()%。
A.5
B.10
C.15
D.20
[单选题] 关于医院的火灾特点,错误的是()。
A. 人员疏散任务重,难度大。住院部患者多,行动困难
B. 药房起火烟雾浓,毒性大
C. 烟雾四处流窜,易造成火势蔓延
D. 灭火行动迅速,战斗展开容易
[多选题] 发生以下那种情况,当保护重合闸和开关正确动作时,必须保持电力系统稳定,但允许损失部分负荷( )。
A.任一发电机组(除占系统容量比重过大者外)跳闸或失磁;
B.母线单相接地故障(不重合);
C.同杆并架双回线的异名两相同时发生单相接地故障不重合,双回线同时跳开;
D.任何线路发生单相瞬时接地故障重合成功。
[单选题]物料提升机的天梁应使用型钢,其截面高度应经计算确定,但不得小于2根( )的槽钢。
A.[10
B.[12
C.[14
D.[16
[多选题]根据中办、国办《关于进一步深化税收征管改革的意见》,涉税专业服务监管工作主要涉及以下哪些意见措施。( )
A.积极发挥行业协会和社会中介组织作用,支持第三方按市场化原则为纳税人提供个性化服务,加强对涉税中介组织的执业监管和行业监管。
B.大力开展税费法律法规的普及宣传,持续深化青少年税收法治教育,发挥税法宣传教育的预防和引导作用,在全社会营造诚信纳税的浓厚氛围。
C.推进区域间税务执法标准统一,实现执法信息互通、执法结果互认,更好服务国家区域协调发展战略。
D.2021年实现征管操作办法与税费优惠政策同步发布、同步解读,增强政策落实的及时性、确定性、一致性。
[多项选择]关于叶间裂积液的描述中正确的有()
A. 梭形
B. 水平裂多见
C. 呈高密度
D. 肋膈角消失
E. 两端与叶间裂相连
[判断题]( )列车进行摘、挂作业开车前,须进行全部试验。
A.正确
B.错误
[单项选择]缺铁性贫血表现为
A. MCV正常,RDW增高
B. MCV增大,RDW正常
C. MCV减少,RDW增高
D. MCV、RDW均正常
E. MCV、RDW均增高
[单项选择]腻子第一道打磨时,手工打磨可使用()砂纸打磨。
A. P60~P80号
B. P80~P120号
C. P120~P240号
[单选题]水泵在工作时从泄水腔流出的水每分钟不超过( )滴。
A.3
B.4
C.5
D.6
[单选题]拆接负载电缆前,应断开电源的输出开关。
A.正确
B.错误
C.略
D.略
E.略
F.略
[单项选择]曹魏时期建立的选官制度是()
A. 分封制
B. 察举制
C. 九品中正制
D. 科举制
[单项选择]退热作用良好,又善解少阳半表半里之邪的发散风热药是
A. 升麻
B. 柴胡
C. 葛根
D. 薄荷
[单选题]ZPW-2000A无绝缘轨道电路应能实现全程断轨检查,主轨道断轨时,“轨出1”电压不大于( ),轨道继电器可靠落下。[322010101]
A.110mV
B.120mV
C.130mV
D.140mV
[填空题]与自由表相比,数据库表可以设置许多字段属性和表属性,以扩展表的功能。例如,某字符型字段的()属性设置为"T!",则在输入和显示时其前导空格自动地被删除,且所有字母圭转换为大写字母。
[判断题]连续X射线的有效能量是指穿透物质后,未被物质吸收的能量。所以穿透厚度越大,有效能量越小。
[判断题]车站所有施工作业均应由施工作业负责人按施工区域向行车值班员办理施工登记手续。( )
A.正确
B.错误
[单项选择]中水处理的主要处理阶段的目的是( )。
A. 去除污水中的有机物和悬浮物
B. 去除大的漂浮物、悬浮物
C. 消毒处理
D. 水质调节
[单选题]在道路进行灭火救援时,打开警灯警报,封闭作业区域,必要时通知道路管理部门协助警戒,发布信息提示,实施交通管制,直至封闭道路,并应在现场警戒的基础上,依托消防车或事故车辆作为安全屏障,严禁在来车方向( )逗留或实施灭火救援行动,并设置人员警示提醒来车避让。
A.背面
B.正面
C.右侧
D.左侧
[单项选择]
{{B}}University Physics{{/B}}
University
Physics is intended for students of science and engineering. Primary emphasis is
on physical principles and problem-solving; historical background and
specialized practical applications have been given a place of secondary
importance. Many worked-out examples and an extensive collection of problems are
included with each chapter.
In this new edition, the basic
philosophy and outline and the balance between depth of treatment and breadth of
subject-matter coverage are unchanged from previous editions. We have tried to
preserve those features that users of previous editions have found desirable,
while incorporating a number of changes that should enhance the book’s
usefulness.
The textbook is adaptable to a wide variety of
course outlines. The entire textbook can be used for an intensive course two or
three semesters in length. For a less intensive course, many instructors wil
A. has been made more applicable
B. is easier to learn
C. covers a wider range of subject-matter
D. has improved the balance between theory and practice
[单选题]用万用表测量电阻时,黑表笔接表内电源的( )。
A.两级
B.负极
C.正极
[单选题]5,11,17,23,29,( )。
A.35
B.38
C.42
D.60
[不定项选择题]共用题干
For many people today,reading is no longer relaxation.To keep up their work they must read letters,reports,trade publications,interoffice communications,not to mention newspapers and magazines:a never-ending flood of words.In__________(51)a job or advancing in one,the ability to read and comprehend quickly can mean the difference between success and failure.Yet the unfortunate fact is that most of us are_________(52)readers.Most of us develop poor reading habits at an early age,and never__________(53)them.The main deficiency_________(54)in the actual stuff of language itself一words.Taken individually,words have_________(55)meaning until they are strung together into phrases,sentences and paragraphs.___________(56),however,the untrained reader does not read groups of words.He laboriously reads one word at a time,often regressing to reread words or passages.Regression,the tendency to look back over_________(57)you have just read,is a common bad habit in reading.Another habit which________(58)down the speed of reading is vocalization一sounding each word either orally or mentally as one reads.
To_________(59)these bad habits,some reading clinics use a device called an accelerator, which moves a bar (or curtain) down the page at a predetermined speed.The bar is set at a slightly faster rate than the reader finds comfortable,in order to "stretch" him.The accelerator forces the reader to read fast,_______(60)word-by-word reading,regression and sub-vocalization,practically impossible.At first_________(61)is sacrificed for speed.But when you learn to read ideas and concepts,you will not only read faster,________(62)your comprehension will improve.Many people have found their reading skill drastically improved after some training.________(63)Charlie Au,a business manager,for instance.His reading rate was a_________(64)good 172 words a minute_________(65)the training;now it is an excellent 1,378 words a minute.He is delighted that he can get through a lot more reading material in a short period of time.
_________(64)
A.disappointedly
B.dramatically
C.absolutely
D.reasonably
[单选题]采取适当的措施,使燃烧因缺氧气助燃而熄灭,这种方法称作( )。
A.隔离灭火法
B.窒息灭火法
C.冷却灭火法
[单选题]中压配电网(10kV)公共连接点电压总谐波畸变率应小于( )。
A.5%
B.4%
C.3%