对目视光学仪器的共同要求是什么?
参考答案:
视放大率应大于1;通过仪器后出射光束应为平行光束,即成像在无限远,使人眼相当观察无限远物体,处于自然放松无调节状态
Every year a flood of farmers arrive in Shenzhen for money-making jobs they()before leaving their hometowns.
A. promised
B. were promised
C. have promised
D. have been promised
getSize( ).width指的是什么
A.界面组件的窗口宽度
B.在Java中任何图形用户界面的宽度
C.框架的窗口宽度
D.用户显示器的宽度