Don’t Count on Dung "Conservationists(自然保护主义者)may be miscalculating the numbers of the threatened animals such as elephants, " say African and American researchers. The error occurs because of a flaw in the way they estimate animal numbers from the piles of dung(粪)the creatures leave behind. The mistake could lead researchers to think that there are twice as many elephants as there really are in some regions according to Andrew Plumptre of the Wildlife Conservation Society(WCS) in New York. Biologist Katy Payne of Cornell University in Ithaca, New York, agrees. "We really need to know elephant numbers and the evidence that we have is quite indirect, "says Payne, who electronically tracks elephants Counting elephants from planes is impossible in th A. Andrew Plumptre. B. Katy Payne. C. Anthony Chifu Nchanji. D. the writer of the article. [单项选择]送电线路中导线在悬点等高的情况下,杆塔的水平档距与垂直档距()。
A. 相等; B. 不相等; C. 无关; D. 近似。 [单选题]过分强调感性认识的作用,否认理性认识的重要性的观点,在哲学上属于( )。
A. 唯理论学派 B. 经验论学派 C. 唯物主义阵营 D. 唯心主义阵营 [单项选择]当作业正常运行结束,或因错误而终止运行时,作业处于()。
A. 后备状态 B. 运行状态 C. 完成状态 D. 收容状态 [单项选择]配对X2检验的备择假设为()。
A. B≠C B. B=C C. P1≠P2 D. P1=P2 E. β1≠β2 [单项选择]统计表的列表原则包括()。
A. 重点突出 B. 简单明了 C. 主谓分明 D. 层次清楚 E. 以上均是 [填空题]灾导致事故发生的各种因素中,()占主要地位。
[单选题]女性,一晚漏服口服避孕药,告知补服时间为性交后
A.5小时内 B.6小时内 C.12小时内 D.18小时内 E.24小时内 [单选题]()是向车辆制动管急速充气的位置,用于充气缓解。
A.急充气位 B.缓充气位 C.保压位 D.缓制动位置 [单选题]党支部多长时间对入党积极分子进行1次考察?( )
A.每月 B.每季度 C.每半年 D.每年 我来回答: 提交
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