用所给单词的适当形式填空

1. It is said that he has____(accumulate)a large fortune.

2. Would it be____  (convenience) for you to pick me up at 2 p.m. and take me to the railway station?

3. In the bard times ,she____(bear)the pain with great courage.

4. Generally speaking, green is usually____(associate) with   life.

某些固体可燃物的蒸气压非常小或者难于发生热分解，当氧气包围物质的表层时，呈炽热状态发生无火焰燃烧，即（）。

A、表面燃烧

B、放射燃烧

C、蒸发燃烧

D、扩散燃烧