→ chihyi091:然後這題是第8題 答案是A 12/17 17:51
In experimenting with artificial suns, Kramer made another interesting
discovery. If the artificial Sun remained stationary, the birds would shift
their direction with respect to it at a rate of about 15 degrees per hour,
the Sun's rate of movement across the sky. Apparently, the birds were
assuming that the "Sun" they saw was moving at that rate. When the real Sun
was visible, however, the birds maintained a constant direction as it moved
across the sky. In other words, they were able to compensate for the Sun's
movement. This meant that some sort of biological clock was operating-and
a very precise clock at that.
7. According to paragraph 5, how did the birds fly when the real Sun was visible?
(A) They kept the direction of their flight constant.
(B) They changed the direction of their flight at a rate of 15 degrees
per hour.
(C) They kept flying toward the Sun.
(D) They flew in the same direction
答案B 可是我覺得是A
大家覺得咧？
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