题目

如图是“验证力的合成的平行四边形定则”实验示意图。将橡皮条的一端固定于A点，图甲表示在两个拉力F1、F2的共同作用下，将橡皮条的结点拉长到O点；图乙表示准备用一个拉力F拉橡皮条，图丙是在白纸上根据实验结果画出的力的合成图示。(1)有关此实验，下列叙述正确的是________(填正确答案标号)。A．在进行图甲的实验操作时，F1、F2的夹角越大越好B．在进行图乙的实验操作时，必须将橡皮条的结点拉到O点C．拉力的方向应与纸面平行，弹簧及钩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.【1】Before 1896 French schools didn't teach ______. A. match B. history C. sports D. physics【2】Baron Pierre de Coubertin ________.A. was the first man to start the Olympics B. helped start the modern OlympicsC. believed that sports were less important than studies D. failed to began the modern Olympics【3】According to this passage, the third modern Olympics should have been held________.A. 1914 B. 1904 C. 1896 D. 1908【4】Marathon in the passage is________.A. a foot race B. a jumping contest C. a field sport D. a boxing match【5】Which of the following is NOT true?A. The Olympics do not begin until the basin of oil catches the fire. B. The torch is carried from runner to runner through many countries.C. Runners who carry the torch can be men or women .D. After the start of the Olympics, the Olympic flame is put out.