According to the passage, which of the following can describe the octopus?
A) Its brain is simpler than that of the squid.
B) It cannot look and touch at the same time.
C) Its brain does not function very well.
D) The memory of what it has seen and touched is contained in separate areas.
E) It is the unique animal in deep waters.
In order to produce commercial records, an original record must first made. It is a flat disc, usually
made of aluminum coated with a soft layer lacquer. As the disc is rotated, a sapphire or ruby stylus
cuts a continue groove in the lacquer cotang. The stylus travels around the disc, making impression
that corresponds to the amplitude and frequency of the sou being recorded. When completed, the
original may be played back to recre; the original recorded sound. If the sound produced by the
original record satisfactory, the original is coated with silver to conduct electricity, and th
electroplated with nickel. When the original is stripped away, a negative the original remains, with a
raised spiral pattern corresponding to the groo\ in the original. The negative is called a master matrix.
Next, the mas matrix is electroplated with nickel to produce a positive of the original. T positive is
called a mother matrix. By electroplating the mother matrix w nickel and stripping it away, stampers
are produced. Stampers are negath of the original record from which the final records may be
pressed.
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