题目

The football match between Class One and Class Three was going on. You were one of the players of Class One. In the first half, your team lost a goal. What happened in the second half? 答案：Although we lost a goal in the first half, we didn’t lose heart. We encouraged each other and determined to win the second one. After it began, we did our best to take every chance. About 15 minutes later, I shot the ball passed by Xiaoming. We got it. With more enthusiasm(热情),finally we defeated them at the score 2:1. We became the winners. Although we were nearly worn out. We were extremel（10分）在探究凸透镜成像规律时，调节光具座上依次排列的烛焰、凸透镜和光屏，使它们的中心大致在同一高度，当物距为18cm时，移动光屏，可在光屏上得到一个的等大、倒立的实像．（1）该凸透镜的焦距是 cm．（2）当物距为15cm时，移动光屏，可得到一个清晰的倒立、 的实像。在放大镜、照相机和投影仪中，成像情况与此类似的是 ．（3）当烛焰逐渐远离凸透镜时，烛焰所成的实像将 （选填“变大”或“变小”），光屏应 凸透镜（选填“远离”或“靠近”）．