补全对话

A: What's the date today?

B: It's June 2^nd.

A: ____ Then it's Dragon Boat Festival today, isn't it?

B: Yes. ____

A: Did you have rice dumplings this morning?

B: Sure. ____

A: I didn't.

B: What a pity! But I happen to have got some with me.  ____.

A: I'd love to. By the way, why do you call it Dragon Boat Festival?

B: Because in China, people race dragon boats this day every year.  

A: Oh, I see. ____

如果配制8%的氯化钠溶液的溶质质量分数偏小，其原因可能是（   ）

【实验设计】

【问题交流】

多次重复实验后，小明发现 A、B 两组种子大部分都萌发且萌发率基本相同，于是得出结论：大豆种子子叶的完整程度不会影响种子的萌发率。小红认为该实验还不足以支持小明的结论，还需要进一步实验，请设计简要的实验方案：____。