题目

________ from Milan Trenc’s novel, the film Night at the Museum brings to life a world where dinosaurs wander the earth. A. Adapted         B. Adapting               C. Having adapted                D. To be adapted 答案：A函数y＝(x＋2a)(x2－a2)的导数为 [　　] A．2(x2－a2)B．3(x2＋a2) C．3(x2－a2)D．2(x2＋a2)