问题
选择题
| 平面镜的玻璃厚5毫米，反射膜涂在玻璃的后表面。一个发光点距玻璃的前表面4毫米，则该点所成的像距玻璃的前表面（ ） |
| A. 14毫米 B. 13毫米 C. 9毫米 D. 4毫米 |
答案
答案：A
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| 平面镜的玻璃厚5毫米，反射膜涂在玻璃的后表面。一个发光点距玻璃的前表面4毫米，则该点所成的像距玻璃的前表面（ ） |
| A. 14毫米 B. 13毫米 C. 9毫米 D. 4毫米 |
答案：A
| 完形填空. | |||
All over the world people swim for fun. Swimming is enjoyed by people of 1 ages, from the very | |||
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