在“探究凸透镜成像规律”的实验中，蜡烛、凸透镜、光屏在光具座上的位置如图所示．

（1）明显还需要调整高度的是____ ．

调整后恰好能从光屏上观察到倒立、____ （选填“缩小”或“放大”）的实像，此凸透镜的焦距f的范围是____ ．该成像特点可作为____ 的原理（选填“照相机”或“投影仪”）．

（2）此时，小明拿来一只眼镜放在蜡烛和凸透镜之间，且较靠近凸透镜．结果，光屏上原来清晰的像变模糊了，他只将光屏向远离凸透镜的方向移动适当距离时，又在光屏上观察到蜡烛清晰的像．由此可见，这只眼镜是____ （填“凸”或“凹”）透镜，戴这种眼镜人的眼睛的缺陷是____ （选填“近视”或“远视”）．

读下列一组海峡示意图。回答下列各题。

    Baron Pierre de Coubertin was a Frenchman. At his time sports were not taught in French schools. De Coubertin believed that sports should go hand in hand with studies. He had an idea. His idea was to begin the Olympics all over again.

    Sports teachers of other countries liked De Coubertin ideas. So in 1896, the modern Olympic Games were held in Athens, Greece. Since then the Olympics have been held once every four years, except three times, when there were wars.

    The modern Olympic games have many foot races and field sports programs. The longest race in the games is called marathon（马拉松）.

    Before the start of the Olympic Games, runners carry lighted torch(火炬) through many nations towards the stadium（体育场 ）where the games will be held. These sportsmen are from different countries. Yet they work together to carry the Olympic torch. It is passed from runner to runner,  When the last runner enters the stadium, he or she places the torch in a special basin filled with oil. It catches fire. It is then, only then, that the Olympic Games can begin.

    The Olympic flame（火焰）burns throughout the games. It is the flame of peace.