给你一盒火柴，若测卫生香的燃烧速度，还需要的器材是          和            。

（1）写出测量的步骤和所测量的物理量

①                                                                         

②                                                                         

③                                                                         

给你一盒火柴，若测卫生香的燃烧速度，还需要的器材是          和            。写出测量的步骤和所测量的物理量

①                                                                         

②                                                                          

③                                                                         

给你一盒火柴，若测卫生香的燃烧速度，还需要的器材是________和________．写出测量的步骤和所测量的物理量
①________
②________
③________．