判断图中各方框内的光学元件，并完成光路图。

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（2015•青岛）如图曲线代表血液中某种成分含量变化趋势，该曲线不能表示（　　）

阅读下列短文，从每题所给的四个选项（A、B、C和D）中，选出最佳选项。

    The modern Olympic Games happened in the year 1896. The Games are held every four years. There are two main sets of Games. The Winter Olympics are held two years before the Summer Games. Many countries want to host the Olympic Games for it's a great honor to be chosen.

The Olympic Games are organized and controlled by the International Olympic Committee (IOC). It sets the general program, chooses the city where the games are to be held, and determines the standards of what is an amateur athlete.

Besides, each participating country has a National Olympic Committee that is responsible for arranging the participation of the nation's athletes in the games.