题目

如图为玉米种子结构示意图，请据图回答下列问题   （1）连接胚芽和胚根的结构④的名称是． （2）往玉米种子纵切面上滴一滴碘液，则变成蓝色的结构是①． （3）能保护种子结构的②的名称是． 答案：（1）胚轴 （2）胚乳 （3）果皮和种皮根据对话内容，从对话后的选项中选出能填入空白处的最佳选项，并在答题卡上将该项项涂。选项中有两项为多余选项。注意与答题卡对应到71―75―Can I help you?―Yes, I’m looking for a sweater.―  61  ―I’m an extra large.―  62  ―Yes, that’s nice.  63  ―Certainly, there is a changing room over there.―Thank you.―  64  ―It’s too large. Do you have a large?―  65  ―Thank you. I’ll have it, please.A．Can I try it on?B．What size are you?C．Yes, let me have a look.D．How does it fit?E．Yes, here you are.F．How would you like to pay?G．How about this one?