题目

一般来说，参与高等植物细胞有丝分裂这一生理过程的主要细胞器有(     ) ①线粒体  ②核糖体  ③高尔基体  ④中心体  ⑤内质网． A．①②③ B．②③④ C．③④⑤ D．①③⑤ 答案：A1.The children (have) a picnic this weekend.2.I think our team ( win) the speech contest (演讲比赛) next week.3.How long it (take) to get there by bus to?morrow?4.Look at the clouds in the sky.It (rain) .5.—The children (visit) the park tomorrow,right?—Yes,they are.