题目

在“探究平面镜成像的特点”实验中，某同学用玻璃板、相同的两个棋子A和B、刻度尺、白纸、橡皮泥等器材进行实验，如图所示． (1)在寻找棋子A的像的位置时，眼睛应该在棋子_______ (选填 “A”或“B”)这一侧观察，移动玻璃板后的棋子B，使它与棋子A在玻璃板中所成的______重合；(2)实验中使用刻度尺，是为了测量_____________________ ；(3)移开棋子B，用白纸做屏幕放在该位置，直接观察白纸，发现白纸上无像，可知平面镜所成的像是______像．请根据句意从方框中选择合适的单词，并用其适当形式填空，使句子通顺。 (每小题1分，共5分)    choose    tradition    thirty    you    serious 1.Lili’s wish is to become a doctor when she grows up. What is         , Sam? 2.Martin helped the little girl out of a car accident, but he was          wounded instead. 3. Nowadays blogs are much more helpful than          diaries. 4.It is a wise          for these patients to give up smoking. 5.The actor who acted in the TV series last night became famous in his         .