Tina was a ten-year-old girl from England. Two weeks before the 2004 Christmas holiday, her teacher was talking about tsunamis（海啸） in a geography（地理） class at school. This helped her save lives on December 26th, 2004.On that morning, Tina and her family were walking on the Beach and enjoying the sun. Then suddenly, the water went out very far. It was bubbling, too. She told her mother at once. Her mum didn't understand. Tina was very sad. She shouted to her dad. He warned others and everyone left the beach. Because of her warning, the hotel workers quickly helped 100 guests get to a safer place.

已知点A（﹣2，0），B为直线x=﹣1上一个动点，P为直线AB与双曲线y=$\frac{1}{x}$的交点，且AP=2AB，则满足条件的点P的个数是（　　）

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在试管内加入2 mL的食用油，再加入由几种等量的消化液混合配制的“X消化液”，充分振荡后，置于37℃的温水中，以观察食用油被消化的情况．让植物油最先消失的“X消化液”的组成成分是（　　）