已知白磷的着火点是40℃，利用白磷、铜片、热水和冷水不能达到验证“可燃物燃烧需要达到着火点”的实验是（　　）

（2015•广东茂名）请按以下各小题的要求转换句型, 每个空格只准填一个单词。

1.Mrs. Green visited Beijing two years ago. (改为一般疑问句)

_     Mrs. Green _   Beijing two years ago?

2.Susan goes to the music club once a week. (就划线部分提同)

_____________  __________does Susan go to the music club?

3. He was too careless. He failed the exam this time. (合并句子)

He failed the exam this time      was too careless.

4.Not only my parents but also my teachers will join in my party. (改为同义句)

_        my parents _        my teachers will join in my party.

5.It took me 3 hours to make the model building last night. (改为同义句)

I                3 hours            _the model building last nigh

下列图例中表示铁路的是              （     ）