热门试题:
[单项选择]
Bees and Colour
On our table in the garden we put a blue card, and all around this blue card we put a number of different grey cards. These grey cards are of all possible shades of grey and include white and black. On each card a watch-glass is placed. The watch-glass on the blue card has some syrup(果汁) in it, all the others are empty. After a short time bees find the syrup, and they come for it again and again. Then, after some hours, we take away the watch-glass of syrup which was on the blue card and put an empty one in its place.
Now what do the bees do They still go straight to the blue card, although there is no syrup there. They do not go to any of the grey cards, in spite of the fact that one of the greycards is of exactly the same brightness as the blue card. Thus the bees do not mistake any shade of grey for blue. In this way we have proved that they do really see blue as a colour.
We can find out in just the same way
A. Right
B. Wrong
C. Not mentioned
[单选题]我国基群速率为（ ）。
A.64Kb/s
B.1.5Mb/s
C.2Mb/s
D.155Mb/s
[单选题]去甲肾上腺素能神经兴奋引起的效应不包括
A.心脏兴奋
B.胃肠平滑肌收缩
C.支气管平滑肌松弛
D.皮肤黏膜和内脏血管收缩
E.瞳孔扩大
[判断题]爆浆奶盖表面撒一层奶粉装饰。( )
A.正确
B.错误
[单项选择]“简编亏替”的意思是（）
A. 书简匮乏
B. 书简编排不易
C. 替代的书简
D. 书简残缺不全
E. 竹简缺少
[单选题]成都地铁2号线DTS系统电源给主控制单元提供( )V 直流电。
A.12
B.24
C.48
D.36
[判断题]高技术之所以具有辐射性是因为其在应用过程中会形成一个产业链。
[填空题]现代质量检验不单纯是事后（），还同时起到预防的作用。
[单项选择]男性，35岁。心悸气短1年，下肢水肿3个月。查体：BP90/60mmHg，颈静脉怒张，心界向两侧扩大。第一心音减弱，心尖部闻及2级收缩期吹风样杂音，腹部移动性浊音阳性，肝脏大，心电图示左束支传导阻滞。最可能的诊断是（）
A. 冠心病
B. 心肌炎
C. 心包积液
D. 扩张型心肌病
E. 风心病二尖瓣关闭不全
[判断题]2.21驾驶机动车在上道路行驶前驾驶人要按规定系好安全带。
A.正确
B.错误
[单选题]采用电话闭塞法组织行车时，车辆段（停车场）与车站间接发列车均按正向行车办理，不加盖“反方向运行”专用章，但须在路票（）注明走行路径。
A.接车站站名后
B.发车站站名后
C.运行方向箭头上方
D.电话记录号上方
[单项选择]Emily: Did anybody sign your petition Gordon: Yes, we had a hundred signatures, （）.
A. if no more
B. if not more
C. if moreover
D. if not larger
[判断题]反击式水轮机包括混流式、轴流式、斜流式和可逆式水轮机。
[单项选择]一套倾向岩层的倾向和倾角大体一致的是（）。
A. 水平岩层
B. 倾向岩层
C. 单斜岩层
D. 倒转岩层
[单项选择]急性胰腺炎被证实，下列哪项治疗措施是错误的
A. 大剂量广谱抗生素
B. 阿托品或654-2止痛
C. 补液，维持水、电解质平衡
D. 禁食及胃肠减压
E. 严密观察生命体征变化
[判断题]公安机关对被逮捕的人必须在逮捕后的12小时内进行讯问。
A.正确
B.错误
[判断题]现场使用的机具、安全工器具应经厂家认证。
A.正确
B.错误
[单选题]磁翻板式液位计是根据()工作的
A.静压平衡原理
B.液体热胀冷缩
C.被测介质热辐射
D.连通器原理
[单选题]《铁路电力安全工作规程》103号，换变压器高压侧熔丝时，应先切断低压负荷，不准带负荷拉开（）无消弧装置的低压开关。
A.60安及以上
B.60安以上
C.100安及以上
D.100安以上
[判断题]FXO是用来连接传统电话机使用的，普通话机连接上语音网关的FXO口之后,它能够为话机提供电流与拨号音。
A.正确
B.错误
[单选题]固定成本的特点有( )。
A.工程量与固定费用无关
B.与工程量成正比
C.与工程量增减变化无直接关系
D.工程量完成的越多，分摊的固定费用就越多
[单选题]ORACLE中，执行语句：SELECT address1||','||address2||','||address2 "Address" FROM employ；将会返回（）列
A.0
B.1
C.2
D.3
[判断题]数字万用表（DMM）主要由在直流数字电压表的基础上加入交流变压器、交直流电流变换器、电阻变换器构成。
A.正确
B.错误
[判断题]变更计划后，调车长向司机、连结员传达并听取复诵。变更计划时，须停车传达。
A.正确
B.错误
[单项选择]用取土坑作蒸发池时与路基坡脚间的距离不应小于( )。
A. 1～5m
B. 5～10m
C. 10～15m
D. 15～20m
[单项选择]慢性粒细胞白血病下列哪项是Ph染色体的典型易位（）
A. t（9；22）（q34；q11）
B. t（22；9）（q11；q34）
C. t（11；14）（q13；q32）
D. t（14；19）（q32；q13）
E. t（2；22）（q34；q11）
[判断题]力产生加速度时,引起受力物体运动状态的改变。
A.正确
B.错误
[多项选择]以下有关应用铁剂与健康提示的叙述中，正确的是
A. 维生素C促进铁的吸收
B. 硫酸亚铁的不良反应最明显
C. 初始用小剂量，数日后增加
D. 食牛奶、蛋类后服，减少吸收
E. 食肉类、果糖、脂肪类后服，减少吸收
[判断题] 粘合剂选择不当或用量不够,可能会造成片剂的裂片和松片现象。( )
A.正确
B.错误
[判断题]动火作业防火措施未落实，不许作业。
A.正确
B.错误
[单选题]操作票至少应保存（）。
A.6个月
B.1年
C.2年
D.1个月
[判断题]生产经营单位必须为从业人员提供符合国家标准或者行业标准的劳动防护用品，并监督、教育从业人员按照使用规则佩戴、使用。
A.正确
B.错误
[单项选择]When researchers come up with a new treatment that makes us feel or work better, it’s usually not just the truly sick who end up going in for an upgrade. The progress in developing treatments for illnesses that ravage memory and thought raises an important question: might the same tools be used to improve the functioning of minds that by most standards are already running fairly smoothly We may well be approaching an era of designer brains, in which those of us feeling a little foggy or dull can have our IQ, fast recall, and self-confidence inflated up via the prescription pad. "Some brain-related conditions we think of as ordinary, "says one researcher, "may eventually become disorders, too"—including perhaps less-than-razor-sharp thinking.
The notion of a prescription IQ lift is hardly new. According to polls, about one in 20 college students, and higher percentages of professors, already illicitly pop some form of Ritalin or Modafinil—legitimately prescribed for attention-de
A. The genes of Alzheimer’s disease have been decoded after the decoding of human genome.
B. Brain diseases usually are the outcome of interaction of complicated groups of genes.
C. The scientists’ findings on genes have quickly lead to understanding of mental diseases.
D. the complexity had stopped the researchers from come up with treatment to mental diseases.
[判断题]现阶段全国各族人民的共同理想是实现共产主义。( )
