02年10月语法25、40

jackiepluto

25. Rocks form within Earth are called intrusive or plutonic rocks because the magma from which they form often intrudes into neighboring rock.

选A，没错。但我有疑问的是D：into neighboring rock，rock是单数，neighboring前是否应该加上冠词呀。

40. A mutation is result of a definite biochemical change in a gene that causes the offspring to vary in some characteristic from the parents.

选A，改正：result：the result，若改为a result是否正确。因为有个短语：a result of

谢谢。

[此贴子已经被作者于2005-12-27 21:55:12编辑过]

gre3333

1。rock是不可数名词，可以不加冠词。

2。不行。