假设过氧化氢生成氧气的快慢与催化剂种类有关．

Zhang Peng：Hi, Wang Ping. You look fine. How heavy are you?

Wang Ping：I'm 48 kilograms. You are thinner than me, but you look taller than before. How tall are you?

Zhang Peng：I'm 1.6 metres and 45 kilograms.

Wang Ping：Oh, really? You are 0.05 metres taller than me. But I'm 3 kilograms heavier than you. You should eat more.

Zhang Peng：OK, I will. Thank you.

My sister will cook for us this evening. (改为一般疑问句)

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已知函数f（x）=$\frac{1}{x}$﹣log₂x，在下列区间中，函数f（x）有零点的是（　　）

反法西斯国家协同作战，开辟欧洲第二战场的战役是(     )