Red meat, eaten__________, is very high in fat and calories.
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Into her nineties, her thinking remained______and her character forceful.
We have_________ $25 per adult to arrive at a basic room rate
显微镜的分辨率主要取决于:
A. 焦距
B. 数值孔径
C. 放大率
D. 视场角
10 倍望远镜,出瞳口径为 5mm,入瞳口径为:
A. 5mm
B. 10mm
C. 25mm
D. 50mm