问题：Paragraph 4 ______...
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问题：People are confused in their attempts to control malaria in Europe in the early 1900s, because scientists ______.A．identified only one mosquito species instead of six speciesB．thought only three mosquito species transmitted diseaseC．thought there was only...
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：Thousands of people perished in the storm.A．diedB．sufferedC．floatedD．scattered...
问题：In Britain and many other countries appraisal is now a tool of management.A．evaluationB．efficiencyC．productionD．publicity...
问题：What will be the benefit if the research on smart windows turns out to be successful, according to the last paragraph?A．The buildings will look different.B．Windows can be as large as you want.C．We may not need air conditioners any more.D．They are less exp...
问题：A great deal has been done to remedy the situation.A．maintainB．improveC．assessD．protect...
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....
问题：Paragraph 5 ______...
问题：Henry cannot resist the lure of drugs.A．abuseB．flavorC．temptationD．consumption...
问题：Whistles could also be used to communicate between adult dolphins and baby dolphins.A．RightB．WrongC．Not mentioned...
问题：The energy stored in coal ______....
问题：______ when electron rearrangement takes place....
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...
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：We can use energy from the sun because ______....
问题：He is determined to consolidate his power.A．strengthenB．controlC．abandonD．exercise...
问题：Ronan Hickey analyzed almost 2000 different dialects of the bottle-nose dolphins.A．RightB．WrongC．Not mentioned...
