问题："Hidden" Species May Be Surprisingly CommonCryptic 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 e...
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问题：We can use energy from the sun because ______....
问题：A great deal has been done to remedy the situation.A．maintainB．improveC．assessD．protect...
问题：Do scientists know how many cryptic species exist?A．Not yet.B．Yes, they do.C．They will know the answer in another one or two years.D．They will never know the answer....
问题：In Britain and many other countries appraisal is now a tool of management.A．evaluationB．efficiencyC．productionD．publicity...
问题：Irish Dolphins May Have a Unique DialectIrish scientists monitoring dolphins living in a river estuary in the southwest of the country believe they may have developed a unique dialect to communicate with each other.The Channel Dolphin and Wildlife Foundat...
问题：The energy stored in coal ______....
问题：Thousands of people perished in the storm.A．diedB．sufferedC．floatedD．scattered...
问题：Ronan Hickey analyzed almost 2000 different dialects of the bottle-nose dolphins.A．RightB．WrongC．Not mentioned...
问题：The river widens considerably as it begins to turn west.A．twistsB．stretchesC．broadensD．bends...
问题：Which of the following about the African bush elephant and the African elephant is true?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....
问题：The Building of the PyramidsThe oldest stone buildings in the world are the pyramids.【46】 There are over eighty of them scattered along the banks of the Nile, some of which are different in shape from the true pyramids. The most famous of these are the "S...
问题：______ when electron rearrangement takes place....
问题：What was scientists' understanding of cryptic species?A．They occurred in equal numbers in all biogeographical regions.B．They were mostly found in insects and reptiles.C．They were likely to be in tropical rather than temperate regions.D．Both Ｂ and Ｃ....
