题型:阅读理解 题类:常考题 难易度:普通
贵州省毕节市实验高级中学2020-2021学年高一上学期英语期中试卷(含听力音频)
Can trees talk? Yes, but not in words. Scientists have reason to believe that trees do communicate with each other. Not long ago, researchers learned some surprising things. First a willow tree attacked in the woods by caterpillars changed the chemistry of its leaves and made them taste so terrible that they got tired of the leaves and stopped eating them. Then even more astonishing, the tree sent out a special smell—a signal causing its neighbors to change the chemistry of their own leaves and make them less tasty.
Communication, of course, doesn't need to be in words. We can talk to each other by smiling, raising our shoulders and moving our hands. We know that birds and animals use a whole vocabulary of songs, sounds, and movements. Bees dance their signals, flying in certain patterns that tell other bees where to find nectar for honey. So why shouldn't trees have ways of sending message?
Which tablet computer should YOU be buying: They are this year's must have ... and there's a style to suit everyone.
Best for young children LeapPad Explorer 2, £68 Aimed at children between three and nine (though a nine-year -old might find it a little simple), it comes in pink or blue and with five built-in education games (you can buy more). Besides, the LeapPad does not allow access to the internet — so it is impossible for your child to stumble across anything inappropriate. Pros: The education games are well- designed, the built-in video camera is a fun way to play at being a film director. Cons: Some of the games are shockingly expensive. And the power adaptor is not included. | Best for teenagers iPad 4th generation, £399-£659 The iPad is still the market leader, and for good reason. If the teenager in your house enjoys playing computer games, the latest offering from Apple is the one to choose. Pros: No other tablet can compete with the near one million ‘apps' (the name Apple created for specially-designed downloadable programs) available for the iPad. Simple to use, even for those who usually struggle with technology. Cons: Considerably more expensive than most competitors. |
Best for working parents Microsoft Surface, £399-£559 Tablets are brilliant for leisure — but what if you want to do a bit of work? No tablet can yet compete with a full-size laptop computer, but this is the only tablet that allows you to use Microsoft Word, Excel and Powerpoint (they are all pre-installed and included in the price) and you can buy a pretty lovely mini-keyboard for typing letters and emails, which also doubles up as the cover. Pros: The Surface is good for watching movies — a bonus when stuck in the airport on a business trip — and surfing the internet. Cons: The keyboard is an expensive add-on — costing up to £109. It might be cheaper to buy a laptop (though a tablet is much smaller and lighter). | Best for bookworms Amazon Kindle Paperwhite, £109 Nearly all tablets let you download books. It's a great way to take a mountainous pile of hardbacks on holiday without stuffing your suitcase. But most tablets have a shiny screen — which can be very distracting (分心) when you're trying to read. The Paperwhite is different: its matt screen and crisp black lettering imitate the look of words on paper brilliantly. And yet you can still read the words in the dark. Pros: Easy on the eye, excellent battery life, 180,000 free books (if you subscribe to the Amazon Prime customer loyalty service) plus hundreds of thousands more to buy. Cons: No TV, films, games, internet or camera. |
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