There are two main causes of cancer: heredity and environment.(1) ___________________________, that is, the basic physical characteristics that were passed on to us by our parents. However, we can do a great deal to control our environment, which may account for eighty to ninety percent of all cancers. (2) _______________________________. Personal pollution may be defined roughly as unhealthy habits such as smoking, drinking, and eating the wrong foods. Clearly, with enough will power we can control this personal environment. Non-personal pollution, on the other hand, refers to those things which are beyond our individual control. One example would be industrial pollution, which is very hard to control because of the expenses involved. (3) _____________________________________. The American automobile industry, for example, resisted the law requiring smog-control devices because it feared the added expense would reduce profits. Nevertheless, some laws protecting the environment have been quite successful in reducing pollution.
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作者: xiaotantan 时间: 2011-9-27 14:50
1)We can do nothing do change a heredity
2)Environment of pollution can be divided to kinds ,personal and non-personal
3)It could be excessive interms profits and perhaps jobs作者: chenyuan0909 时间: 2011-9-27 16:31
1）We can do nothing to change our heredity.
2)Environment pollution can be divided into two kinds:personal and nonpersonal.
3)It would be expensive interms profit and perhaps jobs.作者: chenyuan0909 时间: 2011-9-27 16:33
2. Enviromnental pollution can be divided into two kinds: personal and non-personal
3. It would be expensive in terms of profits and perhaps jobs
好好学习，努力向上！！！作者: dragman 时间: 2011-9-27 16:52
1) we can do nothing to change our heredity
2) An environment pollution can be divided into two kinds : Personal and non-Personal
3) it would be expensive in term of profits and perhaps jobs作者: gaojinli22 时间: 2012-2-5 15:33
1) we can do nothing to change our heredity
2) An environment pollution can be divided into two kinds : Personal and non-Personal
3) it would be expensive in term of profits and perhaps jobs作者: lxy1994 时间: 2012-2-5 20:51
We can do nothing to change our heredity .
Environment
