单选题：What is responsible for the destruction of Sumatlan tiger h

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题目内容：
What is responsible for the destruction of Sumatlan tiger habitat? A．People who killed or maimed those scared animals．
B．People who cut down the rain forests in abundance．
C．The extension of oil palm and pulpwood cultivation．
D．The loss of lain forests owing to palm plantations．

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经过半个世纪的孕育和发展，生物技术及生物产业进入了一个全新的发展阶段，其发展势头十分迅猛，已经成为当今高技术群体中最富有

经过半个世纪的孕育和发展，生物技术及生物产业进入了一个全新的发展阶段，其发展势头十分迅猛，已经成为当今高技术群体中最富有活力的领域之一。生物技术与信息技术、纳米

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What conclusion Call we get from the research performed by

What conclusion Call we get from the research performed by professor Mcaleer an

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听音频，回答下列问题：

听音频，回答下列问题：A．Her new refrigerator is very expensive． B．Her new refrigerator is

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