题目

 More and more trees were cut down. _____, many animals are dying out.        A.In the end       B.So that          C.As a result    D.At last     答案：C如图，在⊙O中，圆心角∠BOC=60°，则圆周角∠BAC等于（ ）A．60°B．50°C．40°D．30°