| 郎女士，28岁，初产妇，妊娠39周，产程进展24小时，宫口开大4cm，肌注催产素10U，宫缩持续不缓解，胎心100次/分，耻上有压痛，腹部有一环状凹陷 |
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{{B}}Winged Robot Learns to Fly{{/B}} Learning how to fly took nature millions of years of trial and error --but a winged robot has cracked it in only a few hours, using the same evolutionary principles. Krister Wolff and Peter Nordin of Chalmers University of Technology (CUT) in Gothenburg, Sweden, built a winged robot and set about testing whether it could learn to fly by itself, without any pre-programmed data on what flapping is or how to do it. To begin with, the robot just twitched and jerked erratically. But, gradually, it made movements that gained height. At first, it cheated -- simply standing on its wing tips was one early short cut. After three hours, however, the robot abandoned such methods in favor of a more effective flapping technique, where it rotated its wings t A. Two vertical rods. B. A movement detector. C. An elastic band. D. Both B and Ｃ. [单项选择]下列关于胆道系统的叙述，错误的是（）
A. 胆汁全部由肝细胞分泌 B. 胆囊24小时可接纳胆汁500ml C. 促进胆汁分泌最强的是促胰液素 D. 成人每日分泌胆汁约800-1200ml E. 毛细胆管再调节胆汁流量和成分方面起关键作用 [单项选择]适宜山茶花生长的最佳土壤PH值是（）。
A. 5.5——6.5 B. 4.5——6.5 C. 6.0——7.0 D. 5.5——7.5 [单项选择]下列有关薄层色谱法概念不正确的是（）。
A. 薄层色谱法是在薄层板上进行的一种色谱法 B. 薄层色谱法的分离原理与柱色谱法相同，所以又称敞开的柱色谱法 C. 薄层色谱法具有快速、灵敏、仪器简单、操作简便之特点 D. 薄层色谱法中用于定性分析的主要数据时各斑点的Rf值与Rs值 E. 吸附薄层色谱中吸附剂的颗粒度应比吸附柱色谱中的吸附剂颗粒度粗一些 [单项选择]车载ATP设备故障不能使用时应采用（）模式
A. ATO模式 B. SM模式 C. RM模式 D. URM模式 [填空题]Many theories concerning the causes of juvenile delinquency (crimes committed by young people) focus either on the individual or on society as the major contributing influence. Theories ________on the individual suggest that children engage in criminal behavior ________they were not sufficiently penalized for previous misdeeds or that they have learned criminal behavior through ________with others. Theories focusing on the role of society suggest that children commit crimes in ________ to their failure to rise above their socioeconomic status, ________ as a rejection of middle-class values.
Most theories of juvenile delinquency have focused on children from disadvantaged families, ________ the fact that children from wealthy homes also commit crimes. The latter may commit crimes ________ lack of adequate parental control. All theories, however, are tentative and are ________ to criticism.
Changes in the social structure may indirecfiy ________ juvenile crime rates. For ex
A. A．case B．short C． turn D．essence [判断题]原告可以提供证明行政行为违法的证据。原告提供的证据不成立的,被告可以免除相应的举证责任。( )
A.正确 B.错误 [判断题]列车运行图分为基本列车运行图和分号列车运行图。
A.正确 B.错误 [单项选择]
男性，16岁，面色苍白半年。体检：中度贫血貌，巩膜轻度黄染，脾肋下2.5cm。检验：血红蛋白81g/L，白细胞及血小板正常，网织红细胞16%；Coombs试验(-)；红细胞渗透脆性试验，初溶为58%氯化钠溶液，全溶为46%氯化钠溶液。 若确诊为上题中的疾病，下列说法正确的是（ ）A. 可分为水肿细胞型、干细胞型和其他型 B. 红细胞渗透脆性试验示脆性增加，红细胞寿命缩短 C. 自身溶血试验溶血＞5%，加ATP不能纠正 D. 为常染色体隐性遗传性疾病 E. 病变来源于造血干细胞的突变，是一种克隆病 [单选题]化工生产的连续性,要求供电不间断,一般采用( )供电。
A.单电源 B.双电源 C.三点源 D.自备电厂 我来回答: 提交
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