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  What is the purpose of silver in making commerical records?



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Reading passages-fayllar.org (1), Reading Challenge Test Bank is designed for courses using the-fayllar.org, [@IELTS Speaking 9] 179 IELTS Speaking Part 2 Samples. (1)
67. 
What is the purpose of silver in making commerical records?
A) It strips away the original record.
B) It cuts a groove in the original record.
C) It aids in electroplating the original record.
D) It makes an impression on the stamper.
E) It is very strong.
68. 
The mother matrix is a (n) .
A) negative of the original record
B) stamper
C) original record
D) record made from a master matrix
E) hard disc
69. Laquer is used to coat the aluminum disc .
A) because it conducts electricity
B) because it can be cut by a stylus
C) because it cools quikly
D) because it protects the impression in the aluminum
E) because it is vey soft
The science of meteorology is deals with the study of the structure, state, and behavior of the atmoshere.
The subject may be approached from several directions, but the scene cannot be fully appreciated from






132 
any one vantage point. Various views must be
integrated to give perspective to the whole picture.
One may consider the condition of the atmosphere at a given moment and attempt to predict changes
from that condition over a period of a few days ahead. This approach is included in the branch of the
science called synoptic meteorology. Synoptic meteorology is the scientific basis of the technique of
weather forecasting by means of the preparation and analysis of weather rrnps and aerological diagrams.
The practical importance of the numerous applications of weather forecasting cannot be overestimated.
In serving the needs of shipping. aviation, agriculture, industry, and many other interests and fields of
human activity with accurate weather warnings and professional forecast advice, great benefits are
reaped in the form of the saving of human life and property and in economic advantages of various kinds.
One significant purpose of the science of meteorology is constantly to strive, through advanced study and
research, to increase bur knowledge of the atmosphere with the aim of improving the accuracy of weather
forecasts.
70. The predictions of synoptic meterologists are directly based on the_____________.
A) application of the physical sciences
B) preparation and study of weather maps
C) anticipated needs of industry
D) observations of commercial airline pilots
E) behaviours of animals

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