小测验：选择正确的单词

1. iceberg lettuce
   n. 〈植〉卷心莴苣
   

1. The iceberg loomed out of the fog.
   冰山从雾中隐约地出现。
2. Only the tip of an iceberg pokes up above water.
   只有冰山的尖端突出于水面。
3. The ship hit an iceberg and capsized.
   船撞上冰山而倾覆。
4. What the press has reported is only the tip of the iceberg.
   见报的只是冰山的一角。
5. The steamer sank when it crashed into an iceberg.
   轮船撞上冰山后沉没了。

　2个名词解释