题目

甘薯种植多年后易积累病毒而导致品种退化。目前生产上采用茎尖分生组织离体培养的方法快速繁殖脱毒的种苗，以保证该品种的品质和产量水平。这种通过分生组织离体培养获得种苗的过程不涉及细胞的(    ) A.有丝分裂        B.分化           C.减数分裂         D.全能性 答案：C根据对话情景和内容，从对话后所给的选项中选出能填入每一空白处的最佳选项，并在答题卡上将该选项涂黑。选项中有两个为多余选项。―Good afternoon. ____小题1:_____ ― Hello. My mobile phone isn’t working. Could you repair it please?―_______小题2:________ ―It worked well yesterday, but I simply couldn’t turn it on this morning.―. _____小题3:______― Here you are.―Well, I think we’ll be able to fix it. You can pick it up this Friday.― Oh,no. That’s too long.______小题4:________I need it as soon as possible.―Let me see. How about Wednesday afternoon?― _____小题5:____ What time?― At five o’clock.― OK. Thank you.A．That’s great.B．I beg your pardon?C．Let me have a look.D．What’s the problem?E. I’m sorry to here that.F. What can I do for you?G. I wonder if you could repair it earlier.