验光所用试镜架，应调整为：试镜架镜平面与镜腿的夹角为（）左右。
A.15°
B.30°
C.60°
D.80°
参考答案：A
Despite its center nowhere near the islands， Morakot(the typhoon) is being blamed for 25 deaths in the Philippines.
A．was
B．being
C．is
D．has been
计算机硬件系统由中央处理器、硬盘、键盘、鼠标和显示器五大基本部件组成。 ( )
