A.Later I received 50 cents an hour. |
B.Before long, she let me sit there by myself. |
C.I ended up selling a record amount of cosmetics. |
D.Today I still carry that lesson with me: I listen to customers. |
The Magnetic Sense ![]() | |
Passage outline | Supporting details |
The existence of the earth magnet and the invention of the navigating compass | ◇Our earth is a big magnet and a little freely (71) ▲ magnetic needle lines itself with the earth magnet to point north and south. ◇(72) ▲ on ![]() |
The possibility of birds’ built-in compasses | ◇ One piece of evidence is the (73) ▲ of many birds between their summer homes and winter homes. ◇ Birds can recognize star patterns on clear nights and keep on course (74) ▲ under cloudy skies |
The (75) ▲ on pigeons’ and bees’ built-in compasses | ◇Little magnets were tied to the pigeons’ heads to (76) ▲ their magnetic sense. ◇The pigeons’ magnetic sense seemed to be affected on (77) ▲ days. ◇Similar things with the same results were done with bees. |
The (78) ▲ of the magnetic stuff for the animal compass | ◇Little rod-like bacteria were found by chance to swim together in the direction of (79) ▲ . ◇Some animals had a chain of dense magnetic particles in or close to the (80) ▲ inside their bodies. |
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