题目

下列有关克隆技术和胚胎工程的叙述正确的是（） A . 动物细胞培养时，不死性细胞在营养满足环境适宜条件下永远不停的分裂下去 B . 水稻等植物在多次继代培养后，其细胞全能性的表达能力不变 C . 经核移植、胚胎体外培养和胚胎移植技术可获得克隆蛙 D . 培养胚胎干细胞过程中加入胚胎成纤维细胞是为了抑制细胞的分化根据首字母或汉语提示或所给词的适当形式填空【1】I asked him what they_______ (think) about each thing.【2】An accident h_______ at the street corner. A car drove too quickly and hit a bike.【3】Many _______ (child) like drinking orange juice.【4】I think Xi Yangyang is as _______ (famous) as Mickey Mouse.【5】Sally thinks soap operas are _______ (educational) than sitcoms.【6】Don’t play a j_______ on disabled people.【7】Let's have a ______ (讨论) about the time when we'll go to Beijing.【8】I want ________(have)a talk with Mr.Smith.【9】Listen!Someone _______ (talk) in the room.【10】What’s the _______ (different) between Chinese and English?【11】Were you _______ (success) in persuading him to change his mind?【12】Mickey Mouse and Donald Duck is a c________.【13】Marie _______ (like) the Beijing Opera very much.【14】Do you mind _______ (open) the window?【15】It is _______ (luck) for him to lose his wallet and cellphone on the playground.