30．What kept pace with house construction according to the text? A．The development of art.
B．The construction of Stonehenge in Europe. C．The dying out of some marine animals. D．The increase in local \ 31．What can be the best title of the text? A．Murujuga: animals are no longer found B．Murujuga: a unique rock art in Australia C．Murujuga: the rock needs protecting D．Murujuga:the art made by using stone tools
D
Bird populations are dropping sharply due to logging, agriculture, and climate change. Scientists keep track of species by recording their calls, but even the best computer programs can't reliably distinguish bird calls from other sounds. Now, thanks to a bit of crowdsourcing and a lot of artificial intelligence (AI) algorithms (算法), researchers say they have something to talk about. AI algorithms can be as finicky as finches, often requiring manual checking and retraining for each new location or species. So a group of researchers launched the Bird Audio Detection challenge, which released hours of recordings from environmental monitoring stations around Chernobyl, Ukraine, which they happened to have access to, as well as crowdsourced recordings, some of which came from an app called Warblr.
Humans labeled (标记) each 10-second part as containing a bird call or not. Using so-called machine learning, in which computers learn from data, 30 teams trained their AIs on a set of the recordings for which labels were provided and then tested them on recordings.
At the end of the monthlong competition, the best algorithm scored 89 out of 100 on a statistical measure of performance called AUC. A higher number, in this case, indicates the algorithm managed to avoid labeling nonbird sounds as bird sounds (humans, insects, or rain often threw them off) and avoid missing
real bird sounds (usually because of unclear recordings), the organizers report. The best previous algorithm they tested had an AUC score of 79.
The algorithm on the top of the pecking order could even generalize well enough to score 84 on samples of nocturnal (夜行的). bird calls that were very brief and hard to analyze and very different from the training sounds. The algorithms can't outperform humans (who were used to labelling the data in the first place), but machines can operate all day and night and don't mind the rain. It's only a matter of time before an AI hatched from this competition takes flight in the real world.
32．What is the purpose of recording the calls of birds? A．To record climate change.
B．To test out some-computer programs.
C．To figure out the reason for worsening environment. D．To pay attention to what happened to birds.
33．What does the underlined sentence in paragraph 2 mean? A．AI algorithms focus on locations. B．AI algorithms have many advantages.
C．AI algorithms are complex and difficult to handle. D．AI algorithms are very popular among scientists. 34．What does the author intend to do in paragraph 3? A．Test the AI algorithms with recordings. B．Present the scientific method of the test. C．Prove the accuracy of the AI algorithms.
D．Explain the theoretical foundation of the competition. 35．What can be inferred from the last two paragraphs?
A．The AI algorithm has improved in telling bird calls from other sounds. B．The test of the nocturnal bird calls scored highest.
C．The statistical measure AUC used in the .research was on trial. D．The AI algorithm often labeled nonbird sounds as bird sounds.
第二节(共5小题)
根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。
Drowning is the second-most common cause of accidental death in children aging 1 to 14 (just behind motor vehicle accidents. ) In a study by a national safety group, 90 percent of children who drowned did \the care of an adult or teenager. ____36____. They are gasping(急促吸气)
____37____. And for young children, who are in a horizontal face-down position, they are unable to keep the mouth above the water's surface at all. ____38____
They have to be able to breathe before they can speak. When people are drowning, their mouths Sink below and reappears above the surface of the water. There isn't time for them to exhale, inhale, and call out. They don't seem in trouble
Sometimes the most important indicator that people are drowning is that they don't look like they are drowning. They may just seem to be looking up at the sky, shore, pool deck, or dock. Ask them, \answer at all, they probably are. ____39____.
They are trying and failing, to swim in a particular direction
A drowning victim can't make any forward progress while in the water, according to the American Red Cross. \'doggy paddle' but has no forward progress,\according to the official lifeguarding guide. ____40____. A．They can't call for help B．They can't wave for help
C．All efforts are devoted strictly to getting air
D．Here are the steps for you to follow when someone is drowning
E．They could also take in water when drowning victims are gasping for air
F．You may have less than 30 seconds to get to them if they return a blank stare G．Watch for these signs that someone is in trouble to avoid a tragedy in the making
第三部分语言知识运用(共两节) 第一节(共20小题)
阅读下面短文,从短文后各题所给的A、B、C和D四个选项中,选出可以填入空白处的最佳选项。
Now that my children are grown and, for the most part, I have recovered a habit, and a love: solo travel. The ____41____ Was planted when I was 17 and went on a class trip to Spain. After that adventure I ____42____ every opportunity to explore on my own, because I wanted to ____43____ as I wished, noting my ____44____ into my journal.
I ____45____, many years ago, before I became a dad, arranging to ____46____ for a summer on an Icelandic farm in exchange for room and board. My ____47____ were to take a bus along the south coast from Reykjavik and get off at a certain crossroads, where the farmer was to pick me up. The driver ____48____ at the appointed place, but no one was there to ____49____ me. And so I put my backpack down in a sheep field and read a book, having ____50____ myself that when one ____51____, one is never lost. Sure enough, within a reasonable amount of time my ____52____ appeared, and I spent a lovely summer haying (制成干草) under the midnight, sun with a family in which not a word of English was ____53____.
I tell this last story to lessen the ____54____ of friends and others who. have occasionally raised their hands to their faces upon hearing what I was up to. Some are specialists in ____55____ for me all the things that can go wrong when one ____56____ oneself into the unknown. But for me, that's the whole ____57____ of travel: to go where I haven't gone before, to ____58____ friendships waiting to be made, to enter a new and, for me, ____59____ environment where being pleasantly surprised is the ____60____.
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