根据管理标准的要求，县级供电子公司各职能部门可不设置安全*区代表。
参考答案：错
已知5cos（45°+x）=3，则sin2x= ．
In order not to let the others hear what he said, he ________ the news to me. [ ]
A. shouted
B. told
C. whispered
D. said
