A.自来水清洗
B.醇清洁剂
C.酶清洁剂
D.pH<7的洗涤剂
E.pH>7的洗涤剂
"Hidden" Species May Be Surprisingly
Common Cryptic(隐蔽的;隐藏的)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(生物多样性)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 (脱氧核糖核酸) 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 numb 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]电气设备外壳在电网中既接地又接零属于保护接地的情况。
[单选题]十进制数80与47进行与运算的结果是()。
A.80 B.47 C.255 D.0 [多选题]多选题 每位起重机司机必须要做到“三不伤害”的原则,即()。
A.不伤害感情 B. 不伤害自己 C. 不伤害他人 D.不被他人伤害 [简答题]休克时的病理生理变化主要有哪三方面?
[判断题]借款人在续贷前要结清贷款本息,续贷期限为两年。
[单选题]TSR系统通过TSR-CTC设备与CTC中心设备通信,由于CTC设备放置于调度中心,因此双方需要通过外部架设的( )进行通信。
A.信号安全数据网 B.2M通道 C.集中监测通道 D.125MLAN通道 我来回答: 提交
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