小明在“研究平面镜成像的特点”实验中：

（1）在玻璃板的一侧放一支点燃的蜡烛A，在玻璃板的另一侧放一支没有点燃的蜡烛B，A和B的要求是

                               ，原因                                                       。

（2）在寻找像的位置时，眼睛应该在                蜡烛（填“A”或“B”）这一侧观察。小明无论怎样调节后面的蜡烛，都不能与它重合，请你猜想原因可能是                                                                    。

（3）小明还发现实验时，用跳棋代替点燃的蜡烛，看不清跳棋的                  像，于是他用灯光将玻璃板两侧都照亮，他能看见跳棋的像吗？              你的改进方法是                                                              。

1) ______the Grammar-Translation Method
2) ______ the Direct Method
3) ______ the Oral Approach
4) ______ the Audiolingual Method
5) ______ the Cognitive Approach
a) The neogrammarians, represented by Hermann Paul formed its main linguistic base.
b) The structural linguists believed that the primary medium of language is oral, that is language is speech.
c) It lays emphasis on the conscious acquisition of language as a meaningful system.
d) It can be characterized as a type of British "structuralism".
e) It believes in the natural process of language learning and in the inductive teaching of grammar.