热门试题:
[判断题]( )初到电气化铁路区段工作的有关工种，必须经过有关安全规定考试合格后，方准单独作业。
A.正确
B.错误
[单项选择]
The food you eat does more than provide energy. It can have a dramatic effect on your body’s ability to fight off heart disease, cancer, diabetes, high blood pressure, stroke, and weak bones. With remarkable consistency, recent research has found that a diet high in plant-based foods--fruits, vegetables, dried peas and beans, grains, and starchy staples such as potatoes is the body’s best weapon in thwarting many health-related problems. These foods work against so many diseases that the same healthy ingredients you might use to protect your heart or ward off cancer will also benefit your intestinal tract and bones.
Scientists have recently estimated that approximately 30 to 40 percent of all cancers could be averted if people ate more fruits, vegetables, and plant-based foods and minimized high-fat, high-calorie edibles that have scant nutritional value. Up to 70 percent of cancers might be eliminated if people also stopped smoking, exercised regularly, and c
A. 30--40
B. 40--50
C. 50--60
D. 60--70
[判断题]大型电力系统有强大的调频和调压能力,有较大的抵御谐波的能力,可以提供质量更高的电能。()
A.正确
B.错误
[多项选择]加入WTO之后，我国出台和完善了一系列外商投资政策和法律法规，重点是( )。
A. 货币周转
B. 股本经营
C. 投资项目
D. 资本运营
E. 服务贸易领域
[填空题]根据Sn2+提供方式或阳极形态的不同，镀锡线又可分为：可溶性阳极生产线和（）生产线。
[单项选择]架空地线距桥梁的最小安全距离是：（）。
A. 50mm
B. 75mm
C. 150mm
D. 240mm
[单选题]箱形基础的底板、内外墙和顶板宜连续浇筑完毕。如设置后浇带,应在顶板浇筑后至少( )以后再进行补缝施工。
A.1周
B.2周
C.3周
D.4周
[填空题]对于标定电压为～12V的采集对象，采集电压应为（）各路采集电流（）。
[单选题]“暴跳如雷”“欣喜若狂”等强烈而短暂的情绪状态是()。
A.愤怒
B.激情
C.应激
D.心境
[单项选择]动物体内的水分经过代谢后要排出体外，下列哪一种水的流失途径称为不感觉失水（）。
A. 粪中排泄的水
B. 尿中排泄的水
C. 呼吸道蒸发的水
D. 形成产品中的水
[单选题]100cm处检影，当检影时发现影动为一方向为顺动光带一方向逆动，则此眼在视网膜成像的点均在视网膜之前。
A. 正确
B. 错误
[单选题]辅助系统通过整流为蓄电池充电，其整流方式为（ ）。
A.单相半波整流
B.单项全波整流
C.单相桥式整流
D.三相桥式整流
[单项选择]The Molecular Genealogy Research Group is building a database for the purpose of ______.
A. offering assistance in working out genealogy-related problems
B. solving many issues without relying on traditional written records
C. providing a pedigree chart of at least four generations in the world
D. confirming tile assumption that all individuals are of the same origin
[单项选择]肾素－血管紧张素系统活动加强时，下列哪项正确（）。
A. 醛固酮释放减少
B. 静脉回心血量减少
C. 肾脏排钠量减少
D. 体循环平均充盈压减低
E. 交感神经末梢释放递质减少
[单项选择]按SOLAS公约规定，当船舶载客达（）人时即为客船。
A. 10
B. 12
C. 13
D. 16
[单选题]柴油机转速试验时，柴油机转速从1000r／min降到430r／min的时间为（ ）。
A.18-20s
B.15—18s
C.20-22s
[判断题]基金合同生效15年以上的，应当登载自合同生效当日开始所有完整会计年度的业绩。( )
[单项选择]HIV感染的细胞主要是（）
A. 神经胶质细胞
B. 单核细胞
C. B淋巴细胞
D. CD4+T淋巴细胞
E. 直肠黏膜上皮细胞
[单项选择]美洲钩虫口囊的特征是
A. 背侧前缘有2对板齿
B. 背侧前缘有2对钩齿
C. 腹侧前缘有1对板齿
D. 腹侧前缘有1对钩齿
E. 以上都不是
[单选题]50．上消化道出血常排出
A.柏油样便
B.陶土色便
C.果酱样便
D.暗红色便
E.鲜红色便
[单选题]欠超高困难条件下不大于（）mm
A.20
B.40
C.60
D.70
[单项选择]
Children loam almost nothing from television, and the more they watch, the less they remember. They regard television purely (71) entertainment, resent programs that put (72) on them and are surprised that anybody should (73) the medium seriously. Far from being over-excited by programs, they are mildly (74) with the whole thing. These are the main conclusions from a new study of children and television. The author, Cardiac Cullingford, (75) that the modem child is a (76) viewer. The study suggests that there is little (77) in the later hours. All 11-year-olds have watched programs after midnight.
Apart from the obvious waste of time (78) , it seems that all this viewing has little effect. Cullingford says that children can recall few details. They can remember exactly which programs they have seen but they can (79) explain the elements of a particular plot. Recall was in " (80) proportion to the
A. dedicated
B. sincere
C. preoccupied
D. choosy
[填空题]Every single car (build) ______ by hand at the company’s headquarters near Turin.
[单选题]机动车驾驶人驾驶车辆时（ ）。
A.可以吸烟
B.精神疲劳时可以少量吸烟
C.不准吸烟
[单选题]我国蔬莱栽培主要以( )作肥料,因此肠道致病菌和寄生虫卵污染很严重。
A.无机肥
B.农药
C.化肥
D.人畜粪便
[单项选择]女，28岁，诊断为右上肺浸润型肺结核伴有空洞，3小时前突然大咯血不止，护理的最关键措施是
A. 保持呼吸道通畅，防止窒息
B. 消除心理不良因素
C. 作镇静，镇咳等对症处理
D. 减少活动，保持安静
E. 准备好急救药品和器械
[判断题]光路跳纤的两端应粘贴光路标签，光路标签的粘贴位置为离尾纤头5-10厘米处。
[单选题]低倍数B类泡沫灭火剂指发泡倍数（ ）。
A.20倍以下
B.20～200倍
C.20～150倍
D.200倍以上
[填空题]锅炉受热面外表积灰或结渣，会使管内介质与烟气热交换时的传热量（ ），因为灰渣的（ ）小。
[单选题]某单位每逢年底会针对全体员工进行评优，评优将项有5个，分别是最佳敬业奖、最佳创意奖、最佳协作奖、最佳写作奖、年度明星奖。其中如果评选了年度明星奖则不能再评选最佳创意将和最佳敬业奖；如果评选了协作奖，就不能再获得写作奖；如果评选了敬业奖，则不能再获得协作奖。每个人最多获得两个奖项。综合科一其3位员工，揽括了所有奖项，每个人都获奖，但是奖项各不相同。已知员工甲获得了明星奖，员工乙和员工丙二人之间有人获得了写作奖。
由此可知，下列推测一定正确的是
A.如果乙获得了写作奖，则其还获得了敬业奖
B.如果乙获得了协作奖，则乙和丙各获得两个奖项
C.如果乙获得了写作奖和创意奖，则甲一定只获得一个奖项
D.如果丙获得了协作奖，则乙一定不能获得敬业奖
[单选题]判断题)起重机转动部位润滑应在工作中用稀油壶点注润滑最有效。
A.正确
B.错误
[填空题]The persons______(对孩子们影响最大的) are their teachers。
[单选题]靠近架空电线搭拆脚手架时，应严格按照供电部门的规定留出安全距离，一般动力线2m以上，照明线（ ） m以上。
A.A.0.5
B.B.1
C.C.1.5
D.D.2
