| How much sleep does a person need
(31) the physiological bases of the need for sleep remain
conjectural (猜想), rendering conclusive answers to this question impossible, much
evidence has been gathered on how much sleep people do in fact obtain. Perhaps
the most important conclusion to be (32) from this evidence
is (33) there is great variability among individuals in
total sleep time. For adults, (34) between six and nine
hours of sleep as a nightly average is not unusual, and 7.5 hours probably best
expresses the norm. Such norms, of course, forms inevitably vary with the
criteria of sleep employed. The most (35) and reliable
figures on sleep time, including those cited here, come from studies in sleep
laboratories, where EEG criteria are employed. (36) consistently has been associated with the va A. As B. Despite C. While D. Whether [单项选择]
A. Trainers. B. Clowns. C. Acrobats. D. Magicians. [填空题]《铁路旅客运输服务质量规范》（铁总运〔2016〕247号）规定：站车客运信息无线交互系统手持终端在（ ）登录，途中信息及时更新。
[多项选择]下列关于神经纤维膜上Na+通道的叙述，哪一项是错误的
A. 是电压门控的 B. 在去极化达阈电位时，可引起正反馈 C. 有开放和关闭两种状态 D. 有髓纤维，主要分布在朗飞结处 E. 与动作电位的去极相有关 [单项选择]关于卵巢生殖细胞肿瘤。最常见类型是（）
A. 卵黄囊瘤 B. 畸胎瘤 C. 无性细胞瘤 D. 胚胎性癌 E. 非妊娠性绒毛膜癌 [单项选择]
As everyone knows, words constantly take on new meanings. Since these do not necessarily, nor even usually, take the place of the old ones, we should picture this process as the analogy of a tree throwing out new branches which themselves throw out subordinate branches. The new branches sometimes overshadow and kill the old one but by no means always. We shall again and again find the earliest senses of a word flourishing for centuries despite a vast overgrowth of later senses which might be expected to kill them. [判断题]天然气在运移过程中,由于井是关闭的,气柱升得越高,液柱压力就越高。
A.正确 B.错误 [单选题]心室等容收缩期瓣膜的状态是( )
A.房室瓣关闭，动脉瓣关闭 B.房室瓣开放，动脉瓣关闭 C.房室瓣关闭，动脉瓣开放 D.房室瓣开放，动脉瓣开放 E.动脉瓣从关闭到开放 [多项选择]管道是由( )、支吊架、仪表装置及其他附件构成，管道通过与设备连接，构成一个密闭循环系统，达到输送介质的目的。
A. 管材 B. 管件 C. 阀门 D. 钢筋混凝土 E. 法兰 [填空题]预防伤亡事故三不伤害（ ）（ ）（ ）。
[简答题]简述班前班后会的主要内容。(5.0分)
[单选题]根据《职业病防治法》，下列（ ）项不属于劳动者在职业活动中应尽的职业卫生义务。
A.正确使用和维护职业病防护设备和个人使用的职业病防护用品 B.发现职业病危害事故隐患及时报告 C.在有职业危害因素的作业场所设置警示标识 [填空题]LAA20102机组内所有可能被触碰的220V及以上低压配电回路电源，应装设满足要求的（ ）。
[简答题]根据《外来人员安全管理办法》制度规定：( )相关人员负责全过程管理，督促参观、学习交流人员以及志愿者遵守分公司有关安全规定。
A. 参观部门（中心） B. 主办部门（中心） C. 接待部门（中心）
[判断题]应急通信设备、器材按照日常检修、集中检修、重点整修三种方式纳入维修体系。防洪、防寒季节及遇有重要繁忙通信保障任务期间，不用增加检查频次。（ ）
A.正确 B.错误 [多项选择]一般来说，成功的创业模式一般需要具备（）等条件。
A. 有效性 B. 全面性 C. 适应性 D. 独特性与反模仿性 [单选题]旅客列车折返（含环线）运行，同一车站同程两次停靠并均办理旅客乘降业务的，该站上车旅客乘坐区间为折返区间外的按第（ ）次停靠起计算运价里程。
A.一 B.二 C.三 D.四 [单项选择]证券发行人派发现金红利或利息时，登记结算公司应按照证券公司( )的实际余额派发现金红利或利息。
A. 客户信用交易担保资金账户 B. 客户信用交易担保证券账户 C. 信用交易证券交收账户 D. 信用交易专用证券交收账户 [单选题]小儿预防泌尿系统感染的措施可除外
A.婴幼儿尿布应用阳光暴晒或开水烫洗晒干 B.便后擦拭的顺序为由前到后 C.及时处理男孩儿包茎、女孩处女膜伞等 D.婴幼儿穿开裆裤，应至自己控制排尿 E.减少导尿或泌尿道器械检查 [单选题]人类进入21世纪后，成为最重要的资源的是( )
A.石油； B.信息； C.土地； D.知识 [单选题]当机场跑道或机场附近地形向上带坡度时，可使飞行员产生
A. 进场偏高的错觉； B. 速度太快的错觉； C. 进场偏低的错觉。 [单项选择]When you want to go shopping and decide how much money you can spend for new clothes, think about the kind of clothes you really need. Then look for those clothes on sale. There are labels(标签) inside all new clothes. The labels tell you how to take care of your clothes. The label for a shirt may tell you to wash it in warm water. A sweater label may tell you to wash by washing in cold water. The label on a coat may say "dry clean only". Washing may ruin(毁坏) this coat. If you do as the directions say on the label, you can keep your clothes looking their best.
Many clothes today must be dry-cleaned. Dry cleaning is expensive. When buying new clothes, check to see if they will need to be dry-cleaned. You will save money if you buy clothes that can be washed. You can save money if you buy clothes that are well-made. Well-made clothes last longer. They look good even after they have been washed many times. Clothes that cost more money are not always better made. They do not always fit [单项选择]牙根面出现牙骨质新生，见于牙周炎的（）
A. 始发期 B. 早期病变 C. 病损确立期 D. 进展期 E. 静止期 [简答题]传染病的传播机制是什么？
我来回答: 提交
|
