"Hidden" Species May Be Surprisingly
Common Cryptic species animals that appear identical but are genetically quite distant—may be much more widespread than previously thought. The findings could have major implications in areas ranging from biodiversity estimates and wildlife management, to our understanding of infectious diseases and evolution. Reports of cryptic species have increased dramatically over the past two decades with the advent of relatively inexpensive DNA sequencing technology. Markus Pfenninger and Klaus Schwenk, of the Goethe-Universitat, in Frankfurt, Germany, analyzed all known data on cryptic animal species and discovered that they are found in equal proportions throughout all major branches of the animal kingdom and occur in equal numbers in all biogeographieal A. The WCU are interbreeding those elephants. B. They are interbreeding species. C. They are two genetically distant species. D. They depend on each other for survival. [判断题]控制中心报警系统应确定一个主消防控制室。( ) (易)
A.正确 B.错误 [多选题]ETC卡是指面向社会公开发行的可用于交纳收费公路通行费的IC卡,包括( )。
A.信用卡 B.储值卡 C.记账卡 D.联名卡 [单选题]特殊感染的敷料燃烧是
A.清洁污区 B.物理消毒 C.化学消毒 D.物理灭菌 E.化学灭菌 [单项选择]下列各项均为肝硬化大量腹水的体征,但应除外
A. 蛙腹 B. 液波震颤 C. 振水音 D. 移动性浊音 E. 脐疝 [单选题] 碎煤机唯一需要调节的是(),它控制着环锤和筛板之间的间隙。
A.筛板架 B.反射板 C.筛板调节器 D.锤头" [判断题]投诉举报、高压新装、增减容的业务实行100%回访。
A.正确 B.错误 [单项选择]脊髓灰质炎患者出现肢体肌肉萎缩的主要原因是()
A. 失去了神经冲动的影响 B. 因肌肉瘫痪使供血减少所致 C. 肌肉失去了运动功能所致 D. 失去了运动神经的营养作用 E. 由于脊髓灰质炎病毒释放的毒素所致 [简答题]请简述单独承保首台(套)重大技术装备保险的保险公司应满足哪些条件。
[单选题](44777)一个电容器所带的电荷量为 q,它的两极板间的电压为 U,则该电容器的电容 C=()。(1.0分)
A.1/U B.q/U C.U/q D.1/q [单项选择]杜-约(Dubin-Johnson)综合征所致黄疸的特点包括()。
A. 血中非结合胆红素正常 B. 血中非结合胆红素升高 C. 血中结合胆红素升高 D. 血中结合、非结合胆红素均升高 E. 血中结合胆红素正常 [判断题]A319飞机,对飞机结构及系统造成最小危害的爆炸位置是离R2门最近的旅客座位。
A.正确 B.错误 [判断题]对于事实清楚、争议情况简单的消费投诉需在投诉发生后7个工作日内制定解决方案并反馈。
A.正确 B.错误 我来回答: 提交
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