题目

下列关于基因工程的叙述，错误的是 A．基因工程的出现使人类有可能按照自己的意愿定向改造生物，从而培育新品种 B．基因工程技术是唯一能克服远源杂交不亲和障碍，培育生物新类型的方法 C．基因工程的基本工具是：限制性核酸内切酶、DNA连接酶和运载体 D．基因工程的受体细胞可来自动、植物或微生物Protecting China’s Giant PandasChina’s giant pandas shows the achievements of the international effort to save animals that are now in danger. In television programs we often see pandas __36____ funny games. Children have panda toys and beautiful cards with pictures of lovely __37_____in them. They often visit the giant pandas in the zoo on __38_____ holidays and have a good time there. However ,scientists are worried about the __39_____ of giant pandas. They know only about 1000 giant pandas remain ___40_____today. They think the giant pandas will die out in 30 years if the present conditions are not ___41____. It is reported that the giant pandas have a very ___42____birthrate. About 115 pandas live in the zoo and research centers mainly in China, but during the past 10 years they __43_____only 34 ____44_____pandas that are still alive. Survival rate for giant pandas in the wild are probably the same or lower. There are several reasons for the low ___45___. The main reason is ___46____male pandas can make love with females in a very ___47_____season ----- only a few days a year. When they do have babies, females often produce two pandas, but the mother is usually not able to care for ___48____of them. The newborn pandas ___49____only a few kilograms each.  They are too weak to live without special care. In the zoo, scientists can help the mothers __50_____for the young pandas, but those living in the wild do not get enough ___51_____. It is very difficult for mother pandas to bring up their young pandas. Conditions for the giant pandas have been worse in recent years. Pandas in China continue to ____52____ in number. We know pandas live on bamboos. But sometimes all the bamboos in one area die. The pandas there have ___53____to eat and die of hunger. Giant pandas now live in 13 separate ___54____ areas in China. Several years ago the Chinese government and the International Wildlife Organization agreed __55_____a project of protecting giant pandas in the wild. We hope it could be useful. 36. A. playB. playing C. doD. doing37. A. pandasB. childrenC. bamboosD. zoos38. A. ourB. theirC. yourD. the39. A. pastB. nowC. futureD. present40. A. liveB. livingC. livelyD. alive41. A. changedB. increasedC. improvedD. considered42. A. lowB. properC. highD. right43. A. clonedB. producedC. keptD. created44. A. smallB. youngC. littleD. adult45. A. priceB. speedC. birthrateD. limit46. A. whyB. howC. whenD. that47. A. shortB. longC. suitableD. certain48. A. allB. bothC. noneD. neither49. A. weightB. heavyC. weighD. heaviness50. A. haveB. raiseC. observeD. care51. A. helpB. foodC. waterD. milk52. A. reduceB. growC. riseD. change53. A. somethingB. nothingC. everythingD. anything54. A. protectedB. protectingC. defendingD. guarding55. A. to B. withC. inD. on