| 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) The evolution of the offspring’s behaviour. B. (B) The look of the offspring’s faces. C. (C) The number of eggs produced by one offspring at a time. D. (D) The offspring’s body size. [判断题] 注汽锅炉尾部燃烧时,喷出大量烟尘( )。
A.正确 B.错误 [填空题]CONVERSATION 1 (Questions 1-4)
About the test: Lasting (1) hours. Time to know the result: (2) Relationship of the two people: (3) and (4) . [单项选择]从近20家汽车金融公司的地域分布情况来年看，近（）的汽车金融公司分布在北上广一线城市。
A. 50％ B. 60％ C. 70％ D. 80％ [单项选择]下列哪个代表双精度浮点数( )。
A. 1.524D B. 0.769f C. 0368 D. 0L [判断题]对违反内务条令的民警情节严重的，应当按照规定采取带离现场、停止执行职务、禁闭措施，给予处分或者限期调离、辞退等处理。( )
A.正确 B.错误 [单项选择]我国于2008年6月9日在西昌发射的中星9号卫星使用的卫星信号传输标准是（）。
A. DVB-S B. ABS-S C. DVB-S2 D. DVB-T [单选题]根据《国家电网有限公司先进典型选树宣传工作管理办法》（国家电网党〔2020〕6号），坚持公平公正公开，参加全国先进典型、行业或地方先进典型评比表彰，以及公司内部先进典型评比表彰，均应进行公示。公示期不少于（）个工作日。
A.3 B.4 C.5 D.6 我来回答: 提交
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