热门试题:
[单选题]手车式开关柜断路器手车在试验位置不能摇进的原因之一是( )。( )
A.接地开关在合闸位置好
B.接地开关在分闸位置
C.断路器在分闸位置
[单项选择]等效孔径095的含义是允许()的颗粒(以质量计)通过筛布。
A. 95%
B. 5%
C. 0.95%
[多项选择]下列对DF4型内燃机车在运行中启动发电机电压突然降零的原因叙述正确的有()。
A. 电压调整器内部故障或插头接触不良
B. 启动发电机励磁绕组回路短路
C. 启动发电机励磁接触器FLC线圈电路故障
D. 启动发电机励磁回路自动开关跳开
[单项选择]低焦油中南海卷烟使用哪种滤嘴类型。()
A. 丙纤滤嘴
B. 醋纤滤嘴
C. 复合滤嘴
D. 通风滤嘴
[单选题]职工发生事故伤害或者按照职业病防治法规定被诊断、鉴定为职业病,所在单位应当自事故伤害发生之日或者被诊断、鉴定为职业病之日起( ),向统筹地区社会保险行政部门提出工伤认定申请。
A.30日内
B.30日后
C.15天内
D.20天内
[不定项选择题]关节僵硬时应进行
A.助力运动
B.患肢骨折的远近关节运动
C.主动运动
D.被动运动
E.手法治疗
[简答题]三相交流转辙机表示电路中应采用反向电压不小于 的整流二极管。
[单选题]下列哪项不是影响水罐消防车真空表不指示真空度或真空度很小的原因( )。
A.吸水管路密封不好
B.引水装置故障
C.超过泵的额定流量
D.滤水器露出水面
[单项选择]Prime Minister Tony Blair and David Beckham were leading a last-minute charm offensive to secure the 2012 Olympics for London — as a new row flared with leading rival Paris.
Mr Blair hailed the capital’s "brilliant" bid to host the games and said the event would provide a "wonderful legacy" for British sport.
He was addressing a reception at the High Commissioner’s residence in Singapore, attended by a glittering array of sporting stars led by David and Victoria Beckham.
Mr Blair, speaking alongside Lord Coe and his bid team, told guests: "We are very proud of our country and we feel we can make the Olympic movement proud of this bid as well."
Dignitaries at the event included the Princess Royal, Sir Steve Redgrave, Daley Thompson, Jonathan Edwards, Sir Matthew Pinsent, Denise Lewis, David Hemery. Tanni Grey-Thompson and Sir Bobby Charlton.
French officials were earlier angered by critical comments about the centrepiece Paris stadium— the Stade de Fra
A. London’s bid.
B. London hosts the 2012 Olympics.
C. The 2012 Olympics.
D. None of the above.
[单项选择]白内障未成熟期散瞳检查禁用的散瞳药为()
A. 新福林
B. 后马托品
C. 双星明
D. 托品酰胺
E. 阿托品
[单选题]一家公司的比较资产负债表上,在2005年12月31日,净收入为150000美元,并且在2005年支付了125000美元的股利,公司的资产负债表如下所示:(2005年12月31日-2004年12月31日)(现金150000美元-180000美元)(应收账款200000美元-220000美元)(总资产350000美元-400000美元)(应付账款80000美元-160000美元)(股票130000美元-125000美元)(留存收益140000美元-115000元丞)(总计350000美元-400000美元)2005年经营活动所获得的净现金流为( )。
A.70000美元
B.90000美元
C.150000美元
D.210000美元
[单选题]Ⅱ类手持电动工具是带有()绝缘的设备。
A.防护
B.基本
C.双重
[判断题]窃电者应按所窃电量补交电费,并承担补交电费的3~6倍的违约使用电费。
A.正确
B.错误
[单选题]机动车辆驾驶员规范操作是( )的具体体现。
A.钻研技术
B.自然形成
C.与生俱来的天赋
[单选题]根据《建筑施工高处作业安全技术规范》规定,两层防护的间距不应小于700mm,安全防护棚的搭设高度不应小于( )。
A.2.5m
B.3m
C.3.5m
D.4m
[判断题] 《山西省煤矿现代化矿井标准》要求矿井必须至少设臵主井、副井和风 井三个井筒,根据需要可适当增加井筒数量。进回风井必须均有安全出口。
A.正确
B.错误
[判断题]出版物内容的形式属性是出版物发行分类的主要标准,而其他属性,如使用对象、体裁、体例、文种、开本等等,作为出版物发行分类的辅助标准。
[单选题]生产经营单位应当建立健全安全生产责任制,明确各岗位的责任人员、责任范围和考核标准,形成包括( )和全部生产经营活动的责任体系,加强对安全生产责任制落实情况的监督考核,保证安全生产责任制的落实。
A.特种作业人员
B.安全管理人员
C.全部人员
[单选题]1.82 在山区道路超车时,应怎样超越?
A.选择较缓的下坡路
B.抓住任何机会尽量
C.选择宽阔的缓上坡路段
D.选择较长的下坡路
[多项选择]开幕式和闭幕式上都有的程序是?()
A. 放飞和平鸽
B. 奏《奥林匹克会歌》
C. 运动员代表讲话
D. 文艺表演
[多选题]多选题:在地铁运营服务中,由于( )等方面的不足或其它原因引起乘客投诉,造成一定程度负面影响或乘客利益损害,相关部门或人员负有责任的,称为有责乘客投诉。
A.治安
B.员工服务
C.地铁规定流程
D.设备设施
[多项选择]代理报检单位《年审报告书》的主要内容包括( )等。
A. 报检业务情况
B. 报检收费情况
C. 报检差错情况
D. 遵守报检规定情况
[判断题]调节阀流量系数国际单位制用KV表示( )
A.正确
B.错误
[不定项选择题]共用题干
第二篇
Some People do Not Taste Salt Like Others
Low-salt foods may be harder for some people to like than others,according to a study by a Penn State
College of Agricultural Sciences food scientist.The research indicates that genetic factors influence some of
the difference in the levels of salt we like to eat.
Those conclusions are important because recent,well-publicized efforts to reduce the salt content in food
have left many people struggling to accept fare that simply does not taste as good to them as it does to others,
pointed out John Hayes,assistant professor of food science who was lead investigator on the study.
Diets high in salt can increase the risk of high blood pressure and stroke.That is why public health ex-
perts and food companies are working together on ways to help consumers lower salt intake through foods that
are enjoyable to eat.This study increases undersfanding of salt preference and consumption.
The research involved 87 carefully screened participants who sampled salty foods such as soup and
chips,on multiple occasions,spread out over weeks.Test subjects were 45 men and 42 women,reportedly
healthy,ranging in age from 20 to 40 years.The sample was composed of individuals who were not actively
modifying their dietary intake and did not smoke cigarettes.They rated the intensity of taste on a commonly
used scientific scale,ranging from barely detectable to strongest sensation of any kind.
"Most of us like the taste of salt.However,some individuals eat more salt,both because they like the
taste of saltiness more,and also because it is needed to block other unpleasant tastes in food,"said Hayes.
"Supertasters,people who experience tastes more intensely,consume more salt than nontasters do.Snack
foods have saltiness as their primary flavor,and at least for these foods,more is better,so the supertasters
seem to like them more."
However,supertasters also need higher levels of salt to block unpleasant bitter tastes in food such as
cheese,Hayes noted."For example,cheese is a wonderful blend of dairy flavors from fermented milk,but al-
so bitter tastes from ripening that are blocked by salt,"he said."A supertaster finds low-salt cheese unpleasant
because the bitterness is too pronounced."
Hayes cited research done more than 75 years ago by a chemist named Fox and a geneticist named
Blakeslee,showing that individuals differ in their ability to taste certain chemicals.As a result,Hayes ex-
plained,we know that a wide range in taste acuity exists,and this variation is as normal as variations in eye
and hair color.
"Some people,called supertasters,'describe bitter compounds as being extremely bitter,while others,
called nontasters,find these same bitter compounds to be tasteless or only weakly bitter,"he said."Response
to bitter compounds is one of many ways to identify biological differences in food preference because super-
tasting is not limited to bitterness."
It can be inferred from the last paragraph that taste acuity is_______.
A.identified with certain chemicals
B.developed over time after birth
C.related to one's eye and hair color
D.genetically determined
[单选题]从安全角度而言,下列哪种房态需要加强观察与检查()。
A.住客房状况
B.双锁房状态
C.保留房状态
D.空房状态
[不定项选择题]A.橘络
A.腹皮
B.绿豆衣
C.肉豆蔻衣
D.莲子芯
E.以去子叶的胚入药的是
[单选题]噪声强度在多少分贝以上,可造成高频率的听力损失
A.60dB
B.80dB
C.100dB
D.110dB
E.120dB
[单选题]1~10kV配电线路尽量不跨越房屋等构筑物,如特殊情况需跨越,导线与建筑物在最大计算弧垂情况下,裸导线不应小于(),绝缘线不小于2.5m。
A.3m;
B.4m;
C.5m;
D.6m。
[判断题]加入白名单的工单,会在第二天内自动归档,在有效期内不会再生成工单。
A.正确
B.错误
[填空题]离心泵输送液体的密度对扬程()影响,但密度增大,功率将()。
[填空题]决策问题可分为三类:结构化决策,半结构化决策和()。
[单项选择]弘扬(),严格自律,不索取和非法收受患者财物不利用执业之便谋取不正当利益。
A. 廉洁从医
B. 爱岗敬业
C. 高尚医德
D. 科学发展观
E. 以上都是
[单项选择]“路见不平一声吼,该出手时就出手……”电视连续剧《水浒传》的主题歌《好汉歌》生动表现出梁山好汉们豪爽不羁、粗犷义气的性格。此歌的曲调取自一首民歌素材,这首民歌与下列哪个地方剧种出自同一个省?()
A. 吕剧
B. 豫剧
C. 评剧
D. 黄梅戏
[单项选择]
Natural Selection
First coined by Darwin, the term natural selection refers to the process at the core of evolutionary theory. Simply put, Darwin believed that every living organism had to struggle to survive and reproduce. By random chance, some individuals in a species would have characteristics that made them better adapted to this struggle than their contemporaries. Such individuals would be more likely to reproduce and pass their characteristics on to their offspring. Over many generations, a series of small differences in characteristics would accumulate, until eventually the creatures that were produced would be so different from their original ancestors that they would constitute a new species. ■
- (A) Although Darwin did not know how variations between individual members of the same species were able to arise in the first place or how such traits could then be passed on from species to species, we now know that this process
A. There is nothing controversial about the now widely accepted view that some traits are selected because they benefit the species.
B. The old view of evolution is utterly wrong and needs to be replaced with a wholly new theory of the creation of species.
C. The gene for homosexuality will eventually be completely phased out of the gene pool for every living species.
D. The human trait of being altruistic is more beneficial to humankind as a whole than it is to any particular human bein
[单项选择]旋转密封阀在使用中应随时检查辅助密封气源工作压力正常为()KPa。
A. 5~8
B. 8~12
C. 12~16
D. 14~18
[判断题]网站登录到搜索引擎,选择不同的类别其收费是不同的。