Appropriately the most effective talk came from Sarah Darwin, whose great-great grandfather was legendary botanist (植物学家)Charles Darwin, one of the founding fathers of the RHS' Scientific Committee. She read a passage from On the Origin of Species and beat nine other “voices”.

　　Her plant grew nearly two inches taller than the best performing male and half an inch higher than her nearest competitor.

　　The experiment began in April, 2009 at RHS Garden Wisley in Surrey. A variety of recorded voices was picked to play to 10 tomato plants over a month. Every plant was played a voice through headphones connected to the plant pot, and the conditions for all the plants remained the same throughout the experiment. To ensure the experiment was fair, two control plants were also left to grow in silence.

　　The results showed that women on average saw their plants rise by an inch on their male counterparts. Some men were so bad that their plants actually grew less than a plant that was left completely alone.

　　Colin Crosbie, the leader at RHS, said: “We’re not sure why the female voice is more effective. It could be that they have a greater range of pitch and tone that affects the sound waves that hit the plant. Sound waves are an environmental effect just like rain or light.”

　　57. What is the best title for the passage?

　　A. Plants can’t grow faster without female voices.

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