热门试题:
[多项选择]以下哪些不属于RIA中标记物的鉴定指标？（）
A. 放射性碘的含量
B. 放射性游离碘的含量
C. 标记前的免疫活性
D. 标记后的免疫活性
E. 放射性比度
[判断题]xfen消防空气呼吸器气瓶压力一般为28~30MPa。压力低于24MPa时,必须充气。气瓶应严格按国家有关高压容器的使用规定进行管理和使用,使用期以气瓶标明期为准,一般每三年进行一次水压试验,超高强度钢气瓶使用年限为十二年。( )(易)
A.正确
B.错误
[不定项选择题]共用题干
Exercising Your Memory
1. Aging does not mean a dramatic decline in memory power,unless you help it happen by let-ting your mind go.
2. That's not to say that memory doesn't change throughout life.Researchers divide memory into categories based on the length of time when memories are stored.One system divides it up as short-term(less than one minute;remembering a telephone number while you dial,for in-stance),long-term(over a period of years)and very long-term memory(over a lifetime).
3. Short-term memory isn't mastered until about age 7,but after that you never lose it.Long-term memory,however,involves more effort and skill and changes more through life .It's not until the early teens（十几岁）that most people develop a mature long-term memory.
4. First,we must get information into our heads through learning. Learning strategies can get rusty（生锈）without constant use. High school and college students , who are forced to repeatedly exercise their long-term memory abilities(at least long-term enough to get them through a final exam),usually do well on memory tests.The longer you stay in school,the more chance you get to polish your learning skills.It's no wonder that more highly educated people have more effective memory skills throughout life.
5. Although older people in general learn somewhat more slowly than they did when younger,a dramatic difference exists between those who stay intellectually active-reading,discussing,taking classes,thinking-and those who do not. Giving the brain daily workout（锻炼）is just as important as exercising your muscles.Brainwork keeps your learning strategies in shape,and this helps your memory to function at full capacity.
6. The next part of a healthy long-term memory is retention（记忆力）,the ability to store what you have learned. Memory researchers still do not know whether memories are lost-whether they still exist in the brain but our mental searching cannot turn them up,or have disappeared entirely as our brain ages.
7. The third necessity for memory is recall,the ability to bring to mind the memories we have stored.Again,while aging has widely different effects on the recall abilities of different people, research indicates that the older we get,the longer it takes to recall facts But slower recall is still recall. In fact,aging does not seem to have any effect on forgetting at all,which takes place at the same rate in younger and older people.
The rate of forgetting is the same______.
A.for younger and older people
B.to the proper function of your memory
C.is called long-term memory
D.the capacity to store what you have learned
E.belongs to very long-term memory
F.the ability to remain mentally healthy
[单选题]进口的放射源应当有明确标号和必要说明文件,其中( )放射源的标号应当刻制在放射源本体或者密封包壳体,( )放射源的标号应当记录在相应的说明文件中。
A.Ⅰ类; Ⅱ类、Ⅲ类、Ⅳ类、Ⅴ类
B.Ⅰ类、Ⅱ类; Ⅲ类、Ⅳ类、Ⅴ类
C.Ⅰ类、Ⅱ类、Ⅲ类; Ⅳ类、Ⅴ类
D.Ⅰ类、Ⅱ类、Ⅲ类、Ⅳ类; Ⅴ类
[单项选择]可能出现不稳定运行的泵的性能曲线是（）。
A. 平坦型
B. 驼峰型
C. 陡降型
D. 都有
[多项选择]按照《2000年通则》的解释，FOB、CFR和CIF的共同点表现为______。
A. 都是装运合同
B. 交货地点都在装运港
C. 均适用于水上运输方式
D. 风险划分都以装运港船舷为界
E. 买卖双方承担的责任、义务相同
[判断题]生产经营单位应当向从业人员如实告知作业场所和工作岗位存在的危险因素、防范措施以及事故应急措施。
A.正确
B.错误
[多项选择]下列哪些属于报检入境废物时应提供的单证( )。
A. 装运前检验证书
B. 进口废物批准证书
C. 旧机电证明
D. 合同、发票、装箱单、提单等
[多选题] 建筑材料的燃烧性能分为()。
A. 不燃性
B. 难燃性
C. 可燃性
D. 易燃性
[单项选择]盐炙的药物是
A. 当归
B. 车前子
C. 淫羊藿
D. 厚朴
E. 川乌
[单项选择]玻璃体内大量棕色尘状混浊及鲜红色团块状混浊（）
A. 增殖性玻璃体视网膜病变
B. 玻璃体后脱离
C. 星状玻璃体变性
D. 闪辉性玻璃体液化
E. 玻璃体积血
[单项选择]一般妊娠后多长时间血清HCG达峰值（）
A. 1～3周
B. 3～5周
C. 6～7周
D. 8～10周
E. 20～25周
[判断题]负外部性使得资源没有实现最优配置，没有达到帕累托最优，而正外部性则可以实现帕累托最优。（）
A.正确
B.错误
[判断题]确认灭火与应急救援现场有疫情时,在做好个人防护的基础上,可选择性佩戴空气呼吸器、氧气呼吸器或者防护口罩(N95防护等级以上)以及护目镜和防护手套。( )
A.正确
B.错误
[简答题]灭火时应当采用正确射水姿势，开、关水枪（）动作要迅速，严禁对射误伤他人。（）
[判断题]列车直进侧出的车机联控用语均为“××(次)××(站)×道通过，直进侧出，侧向过岔限速××公里。（）
A.正确
B.错误
[多项选择]古罗马共和国的行政官吏主要有（）
A. 执政官
B. 独裁官
C. 行政长官
D. 监察官
E. 保民官
[单选题] 苏轼《水调歌头(明月几时有)》是一首( )
A.悼亡词
B.中秋词
C.端午词
D.爱情词
[多选题]高架绝缘斗臂车应(____)。
A.存放在通风的车库内
B.存放在密封良好的车库内
C.存放在干燥的车库内
D.其绝缘部分应有防潮措施
[判断题]《供电营业规则》规定，供电企业应不断改善供电可靠性，减少设备检修和电力系统事故对用户的停电次数及每次停电持续时间。
A.正确
B.错误
[单选题]B-820323雨期施工时，每天的砌筑高度要求不超过（）
A.1.2m
B.1.5m
C.2m
D.4m
[单项选择]The ground is covered ______ snow.
[判断题]甲男与乙女说好以200元的价钱实施性交易，但谈价钱的当时并没有给钱。二人去宾馆开房的路上，民警因二人形迹可疑对他们进行当场盘问检查，二人承认欲实施性交易，且甲男随身携带400元嫖资和房费。对甲男随身携带的200元嫖资，公安机关可以予以扣押。
A.正确
B.错误
[判断题]吊运液态金属或易燃易爆物品起升机构，应装2套起升限位器，且分先后动作。
A.正确
B.错误
[多项选择]施工图预算是在（）预先计算和确定建筑安装工程费用的文件。
A. 施工图设计完成后
B. 工程开工后
C. 工程竣工验收前
D. 工程施工过程中
E. 工程开工前
[单项选择]Questions 18-21 are based on a conversation at a bookstore．What does the salesperson say about the grammar book
A. It’s well written．
B. It’s in great demand．
C. It’s nearly out of stock．
D. It’s the best seller in the store．
[单项选择]1933年11月成立的苏区最高军事学府是( )。
A. 抗日军政大学
B. 苏维埃大学
C. 红军大学
D. 延安大学
[单项选择]氢氧化钙制剂的作用是（）
A. 强缓冲作用
B. 强抗菌作用
C. 促进硬组织形成
D. 抑制细菌产酸
E. 激活酸性磷酸酶
[单项选择]下述哪项不属氯丙嗪的药理作用
A. 抗精神病作用
B. 激动多巴胺受体
C. 镇吐作用
D. 使体温调节失灵
E. 阻断α受体
[填空题]检查二次接线的正确性时,可借用电缆铅皮做( )导线,也可用一根芯线做公共线,用电池和氖灯泡依次检查各芯线或导线是否构成通路。
[填空题]向我国境内出口食品的出口商或者代理商应当向 ( )备案。
[多选题](第三十五条)下列有关倒塌的说法正确的是( )。()
A.扑救楼层火灾,楼层内积水较多时,应组织排水,必要时在确保建筑结构安全的情况下开凿孔洞进行排水,防止楼板承载过重造成坍塌。
B.扑救钢结构建筑火灾时,通常情况下不需要冷却钢梁和钢柱等承重结构,应将主要力量部署在灭火上。
C.破拆着火建筑屋顶,或采取其他排烟措施,实施排烟散热,防止建筑结构因高温强度下降倒塌。
D.根据救援需要对危险建筑结构采取加固措施,消除倒塌风险。
E.必要时对有倒塌风险的构件进行拆除,对有塌方风险的地方进行清除开挖主动排除倒塌风险。
[单选题]抗渗性能较好且具有抗硫酸盐侵蚀的水泥代号是（ ）。
A.P·F
B.P·O
C.P·S
D.P·P
