如图，AC与BD相交于点O，若OA=OB，∠A=60°，且AB∥CD，求证：△OCD是等边三角形．

A: Hey, John's birthday dinner is next week. Let's ____ about the food.

B: Sure. How ____burger, vegetable salad, and some fruit?

C:____ good. John likes hamburgers.

A: Oh, I ____ like salad.

C: But John likes salad, and it's his birthday.

A: Yes, you're right. What about the fruit?

B: I think John likes strawberries and apples.

C: OK. Let's have ____ and apples then.

Linda is _______ her mother in many ways. For example, they are both tall and thin.

在温度、光照都适宜条件下，将消毒后有生活力的小麦种子一直浸没在无菌水中，会使种子死亡．下列对种子死亡原因的分析，合理的是（　　）

请找出本文《一本男孩子必读的书》中出现的成语，读一读，写一写

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