Single mums are better at raising their
kids than two parents—at least in the bird world. Mother zebra finches have to
work harder and raise fewer chicks on their own, but they also produce more
attractive sons who are more likely to get a mate. The finding shows that family conflict is as important an evolutionary driving force as ecological factors such as hunting and food supply. With two parents around, there’s always a conflict of interests, which can have a detrimental effect on the quality of the offspring. In evolutionary terms, the best strategy for any parent in the animal world is to find someone else to care for their offspring, so they can concentrate on breeding again. So it’s normal for parents to try to pass the buck to each other. But Ian Hartley from the University of Lancaster and his team wondered how families solve this con A. (A) Cause and effect. B. (B) Experiment and result. C. (C) Problem and solution. D. (D) Topic and comment. [填空题]同期合环:是指通过自动化设备或仪表检测( )后自动或手动进行的合环操作。
[单项选择]James Martin认为下列哪些措施是解决数据处理部门与最高管理层之间的隔阂
Ⅰ.聘请咨询公司 Ⅱ.为最高管理层放映录像并推荐一本信息系统建设的书 Ⅲ.开设高级管理人员培训班 Ⅳ.与高层管理人员通信、沟通 A. Ⅰ B. Ⅱ C. Ⅲ D. 全都 [判断题]ZDJ9转辙机电路中DBJ属于无极缓放继电器()
A.正确 B.错误 [单选题]关于工程项目质量风险识别的说法,正确的是( )。 2016
A.从风险产生的原因分析,质量风险分为自然风险、施工风险、设计风险 B.可按风险责任单位和项目实施阶段分别进行风险识别 C.因项目实施人员自身技术水平局限造成错误的质量风险属于管理风险 D.风险识别的步骤是,分析每种风险的促发因素→画出质量风险结构层次图→将结果汇总成质量风险识别报告 [单选题]绝缘工具的操作冲击耐压试验宜采用()的标准波,以无一次击穿、闪络为合格。
A.25/250us B.250/2500us C.2500/250us D.250/25us [单选题]ISO14000标准制定于()年。
A. 1992 B. 1993 C. 1990 [单项选择]()探测一般用于车间、锅炉间、焚烧炉间、集控室等相对封闭的高温处所.
A. 感烟 B. 感光 C. 感温 [判断题]用电信息采集系统专网内终端应进行安全加固、安装杀毒软件,可以不及时更新病毒库。
A.正确 B.错误 [单选题]燃气管道进行探伤检验时,检验的位置由施工单位指定。
( ) A.正确 B.错误 [判断题]《南昌局集团公司时速160公里动力集中动车组客运组织管理办法》(南铁客[2021]81号)规定160动车组按双班配置的客运乘务组,始发站实行双班作业,一人在车门口立岗,一人在车厢内做好旅客乘降引导。
A.正确 B.错误 [判断题]在作业场所,人员、机动车辆移动时必须按规定路线行走。
A.正确 B.错误 [多项选择]胰头癌的主要临床特点是()
A. 胆囊增大 B. 厌食、消瘦、乏力 C. 进行性黄疸 D. 上腹部隐痛 E. 肝脏肿大 我来回答: 提交
|