[单项选择]

By （）a cheaper material for the steel in our products, we can greatly reduce manufacturing costs.
 

A. substituting
B. replacing
C. alternating
D. displacing

[单项选择]By （） a cheaper material for the steel in our products, we can greatly reduce manufacturing costs.
A. substituting
B. replacing
C. alternating
D. displacing

[单项选择]The British constitution is a large extent a product of the historical events described above.
A. within
B. to
C. by
D. at

[单项选择]To develop new ideas for expanding their new product line, many firms have recently increased their investments in （）.
A. research and development
B. production facilities
C. distribution facilities
D. overseas production assembly operations
E. inventory control

[单项选择]Nuclear power plants are some of the largest producers of （） wastes, with each plant producing barrels of radioactive material that must be stored in special protective containers.
A. biodegradable
B. hazardous
C. reasonable
D. durable

[单项选择]Since the redesign of the assembly line, the productivity ______.
A) is improved C) is improving
B) improves D) has been improved.


A. Since the redesign of the assembly line, the productivity ______.
B. is improved
C. improves
D. is improving
E. has been improved.

[填空题]The last person who run a workshop which can produce jiaxie cloth was found by Xue Xunlang ______.

[填空题]Stress refers to the degree of force used in producing a syllable. For long words, the more stressed syllable is the （） stress while the less stressed syllable is known as the secondary stress.

[单项选择]Because it is tuned a fifth lower, the viola produces a sound that is more resonant than that of the violin.
A. more vibrant
B. more harmonious
C. softer
D. sadder.

[单项选择] Material culture refers to the touchable, material "thing" physical objects that can be seen, held, felt, used -- that a culture produces. Examining a culture’’s tools and technology can tell us about the group’’s history and way of life. Similarly, research into the material culture of music can help us to understand the music culture. The most vivid body of "things" in it, of course, are musical instruments. We cannot hear for ourselves the actual sound of any musical performance before the 1870s when the phonograph was invented, so we rely on instruments for important information about music-cultures in the remote past and their development. Here we have two kinds of evidence: instruments well preserved and instruments pictured in art. Through the study of instruments, as well as paintings, written documents, and so on, we can explore the movements of music from the Near Eastern influence to Europe that resulted in the development of most of the instruments in the symphony orches
A. it can reflect the development of the nation
B. it can demonstrate the nation’’s civilization
C. it helps understand the nation’’s past and present
D. it helps produce new cultural tools and technology

[单项选择]They requested that we（）them a sample of the product.
A. sent
B. to send
C. send
D. be sent