题目

下列关于细胞的生命历程的叙述正确的是： A、细胞分化使细胞功能趋向专门化是由于遗传物质发生了定向改变 B、对所有生物来说，细胞的衰老和个体的衰老一定不是同步的 C、细胞凋亡过程中有新蛋白质的合成，体现了基因的选择性表达 D、原癌基因存在于机体正常细胞中，抑癌基因存在于癌细胞中 答案：C 第四部分　书面表达（共两节，满分40分） 第一节　完成句子（共10小题；每小题1.5分，满分15分） 71．In ________________(在制定计划时), they went to the library to refer to many books. （draw） 72．________________(聚集在入口周围) of the cave, villagers nervously watched him go down and disappear in the darkness. （gather） 73．________________(她是否喜欢这个礼物) is not clear to me. （like） 74．________________(多给与关注), the trees could have grown better. （give） 75．________________(我突然想到) I had left my cellphone behind at the bookstore. （occur） 76．Don’t be too rude to your father. Never in his life ________________(对他说话) in that way up to now. （speak） 77．The government is trying to do something to ________________(促进更好的了解) between the two countries. （promote） 78．The road outside is wet.It ________________(准是一直在下雨) last night. （rain） 79．It seems that he is not fit for the job, ________________(他所需要的) is more experience. （call） 80．Some species of animals have become extinct because they ________________(不能适应) the changing environment. （adapt）