D．r. Brosnan and Dr. de Waal have eventually found in their study that the monkeys ________.

[A] prefer grapes to cucumbers

[B] can be taught to exchange things

[C] will not be cooperative if feeling cheated

[D] are unhappy when separated from others

[单选题]We can infer from Dr. Myers and Dr. Worm’s paper that ________.[A] the stock of large predators in some old fisheries has reduced by 90%[B] there are only half as many fisheries as there were 15 years ago[C] the catch sizes in new fisheries are only

[单选题]I have an appointment with Dr. Edward.- _________A.Please wait for a minute

[单选题]We can infer from Dr Myers and Dr. Worm’s paper thatA． the stock of large predators in some old fisheries has reduced by 90%. B. there are only half as many fisheries as there were 15 years ago. C. the catch sizes in new fisheries are only 20% of the

[单选题]A．ccording to the third paragraph, Dr. Davies implies that_____.［A］ cosmetic surgery, though costly, is worth having［B］ cosmetic surgery is too expensive［C］ cosmetic surgery is necessary even for the average person［D］ cosmetic surgery is mainly for t

[单选题]D．r. Zhang was always ____ the poor and the sick, his private clinic often providing them with free medical care.A． tended by B absorbed in C concerned about D reminded of

[单选题]D．r. Singer thinks men are more suitable to maintain justice and issue punishment than women because _______ .A． men's brain's empathy centers remained dull when punishment was executedB． women's pleasure centers were lit up with punishment implem

[单选题]D．r. Myers and other researchers hold that ________.[A] people should look for a baseline that can’t work for a longer time[B] fisheries should keep the yield below 50% of the biomass[C] the ocean biomass should restored its original level[D] people

[单选题]Now Dr. Ross is bringing a welcomed medical revolution to the world_________ so many people need it.A． thatB． whereC． howD． which

[单选题]D．r. Yehuda’s research suggests that women[A] need extra doses of chemicals to handle stress.[B] have limited capacity for tolerating stress.[C] are more capable of avoiding stress.[D] are exposed to more stress.

[单选题]Dr. Cole made an analysis of the activity of the genes by __________.A.meas