or even Europe. Tulips actually hail from an area that Chinese call the Celestial
Mountains in Central Asia.
8. According to the professor,where did tulips originate
● the mountains of central Asia
● the region around Istanbul in Turkey
● the sandy soils of the Netherlands
● the forests of northern Europe
例2: TPO6 Lecture4学生因对教授的一处推理过程有疑,教授在解答学生疑问的过程中,列举了三个使推理成立的重要依据。
TPO-6 Lecture-4
Student
But how is that proved that the Sahara used to be a lot wetter? I mean the
people who painted those hippos, well, couldnt they have seen them on their
travels?
Professor
Okay, in principal they could, Karl. But the rock paintings arent the only
evidence. Beneath the Sahara are huge aquifers, basically a sea of fresh
water, thats perhaps a million years old filtered through rock layers.
Anderand then there is fossilized pollen, from low shrubs and grasses that
once grew in the Sahara. In fact these plants still grow, erbut hundreds of
miles away, in more vegetated areas. Anyway, its this fossilized pollen along
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