题目

_______ the latest development of science and technology, he has had many modern communication devices installed in his office. A . To inform of B . Being informed of C . To be informed of D . Having informed of 答案：C14．在△ABC中，已知sinA=2cosB•sinC，则△ABC的形状是（　　）A．直角三角形B．等腰三角形C．等腰直角三角形D．不确定