[填空题]chemical

[简答题]Chemical Oxygen Demand

[单项选择]Formosan Union Chemical
Nan King E.Road
Taipei City
638 Taiwan
Tel: (88-62) 5071234
Fax: (88-62) 5071664
e-mail: formosan@chemical.com.ta
Chemex
Livingstone Industrial Estate
Livingstone
West Lothian
EH 54 1HZ
Scotland
January 15,200-
Dear Sir or Madam:
We are looking for a company which can help us distribute our products in new markets.
We manufacture a wide range of chemical products. At present we export to Canada, but we would like to export to Europe.
Enclosed please find our brochure which gives details of our company.
We look forward to hearing from you.
Sincerely,
Formosan Union Chemical does not export to Canada.
A. right B. worng C. Doesn’t say

[单项选择]Environmental factors such as chemical treatments have a bad effect on the hair in the long nm.
A.环境因素，比如化学处理等对头发都不好。
B.从长远来看，环境，化学处理对头发都有影响。
C.从长远来看，头发被化学等因素的影响是很坏的。
D.从长远来看，环境因素，比如化学处理对头发都有不好的影响。

[填空题]The important metallic chemical element in making stainless steel is ______.

[单项选择] Although the chemical elements niobium and tantalum are not quite ----------zirconium and hafnium, the differences between them are slight
A. as similar
B. as similar as
C. similar than
D. that similar

[单项选择]Producing elastin through chemical synthesis is a tedious process consuming （） three months.
A. the better half of
B. for the better of
C. all the better for
D. the better part of

[填空题]Chemical reactions in our brains change with what we think.

[单项选择]The chemical products under east-west cooperation must ______.
A. adjust themselves quickly to the market
B. be invented quickly to the manufacturers
C. keep steady amount to the clients

[单项选择]The productions manufactured by Asahi Chemical, Japan’s largest poly styrene manufacturer take up ______ of the market.
A. 12%
B. 25%
C. 26.6%

[单项选择]Metabolism is the inclusive term for the chemical reactions by which the cells of an organism transforms energy, maintain their identity, and reproduce.

[简答题]The chemical industry depends very heavily on petroleum and natural gas as sources of raw materials. It is likely that in excess of 80% of the literally thousands of different basic organic chemicals employed today are derived from these sources. The petrochemical industry has grown with the petroleum industry. As is the case with the latest trends in changing crude oil types, it must also evolve to meet changing technological and humanitarian needs. The manufacture of chemicals from petroleum and natural gas constituents is an excellent example of the conversion of such materials to more valuable products. The individual chemicals made from petroleum and natural gas numerous and include industrial chemicals, household chemicals and paints, as well as intermediates for the manufacture of products, such as synthetic rubber and plastics. The processing of petroleum hydrocarbon to yield materials that are, essentially, the building blocks of other chemicals industries, is now ve