Vyplývání

Příklad 1

  • Trees provide people all sorts of benefits. A major one: removing carbon dioxide from the air and storing it. That makes trees an important part of the fight against climate change. But when forest trees grow faster, trees die sooner, a new study finds. That quickens their release of carbon back into the air — which is disappointing news for global warming. However, this does not mean planting trees won’t help fight climate change. Scientists already know that slow-growing species generally live long lives. A bristlecone pine, for example, can live for as long as 5,000 years. A fast-growing balsa tree, in contrast, won’t live past 40. On average, most trees live for 200 to 300 years.

    In the text above, it is explained why dying trees can be a problem for the entire planet. Which of the statements below is the logical implication of this explanation?
    • a) Some trees will slow climate change more than others.b) Planting trees should be our priority in the fight against global warming.c) People should try to create conditions for trees to grow faster.d) Removing greenhouse gases from the atmosphere is a specific benefit of only fast-growing trees.e) Any kind of a slow-growing tree will live a longer life and release more carbon dioxide.
Příklad 2

  • Also known as sea cows, these herbivorous hulking creatures feed mainly on sea grass, scoffing more than a tenth of their bodyweight each day. They have a flat, paddle-shaped tail and come up for air every few minutes. Their head and face are wrinkled, with whiskers on the snout. The manatee’s closest relatives are the elephant and the hyrax (a small, gopher-sized mammal). Manatees are not to be confused with their cousins, dugongs, another sea cow species found around Australia’s Great Barrier Reef, Thailand and elsewhere. Florida’s Crystal River is a known hotspot, with manatee-spotting tours and the chance to snorkel with them.
    Read the text above and decide which one of the following statements is true.
    • a) It is not safe to get in contact with a manatee.b) They gain weight very rapidly.c) They are not fish.d) Dugongs and hyraxes are other species of sea-cows.e) Manatees can only be observed around Asian countries and Australia.