The Beak of the Toucan
Why does the toucan (1)_____ such an enormous beak? The answer, we learned in August, may be that it uses it (2)_____ body temperature. Infrared measurement (3)_____ just before sleep shows that the bird’s long beak — which can grow to (4)_____ of its body size — gets hotter, (5)_____ the bird uses it in the presleep cooling process. At other times, as the external heat rises, so too does the heat of the toucan’s beak, while its core body heat stays the same.
Scientific Progress
Despite warnings that it might set off a catastrophic chain reaction that could (6)_____ the Earth, scientists have (7)_____ created a miniature version of the Big Bang, without any observable ill effects. They were able (8)_____ a temperature of (9)_____ ten trillion degrees — a million times hotter than the centre of the sun — by (10)_____ together lead ions at incredible speeds in the Large Hadron Collider, a 27 km underground tunnel at the CERN (European Organization for Nuclear Research) facility near Geneva.
- А – third
- Б – a three
- В – a third
- Г – three
Виберіть правильний варіант
Завдання мають по чотири варіанти відповіді, серед яких лише ОДИН ПРАВИЛЬНИЙ. Виберіть правильний варіант відповіді та позначте його.