题目

 He _______ his eyes from his book and then _______ from his seat. A. rose / raised        B. rose / rose             C. raised / raised      D. raised / rose 答案：D设函数f（x）=ex（sinx-cosx），若0≤x≤2011π，则函数f（x）的各极大值之和为（　　）A．eπ(1-e2012π)1-e2πB．eπ(1-e1006π)1-eπC．eπ(1-e1006π)1-e2πD．eπ(1-e2012π)1-eπ