已知在△ABC中,P0是边AB上的一个定点,

已知在△ABC中,P0是边AB上的一个定点,

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现有两种淀粉酶 A 与 B, 某生物兴趣小组为探究不同温度条件下这两种淀粉酶的话性, 设计实验如下:实验原理: 温度等条件可以影响酶的活性; 淀粉在淀粉酶的催化

现有两种淀粉酶 A 与 B, 某生物兴趣小组为探究不同温度条件下这两种淀粉酶的话性, 设计实验如下:实验原理: 温度等条件可以影响酶的活性; 淀粉在淀粉酶的催化作用下产生麦芽糖。实验材料: 一定浓度的

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--Have you done the papers yet ?  --Yes, weve finished it.

--Have you done the papers yet ?  --Yes, weve finished it.

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--Tom seems_____today.  --I heard he lost his new watch on the bus this morning.

--Tom seems_____today.  --I heard he lost his new watch on the bus this morning.

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Your T-shirt looks_beautiful, Judy !

Your T-shirt looks_beautiful, Judy !

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