5 . 短语填空。

refer to   be sensitive to   on behalf of   take measures   there is little doubt that

1. _______________ the results are entirely consistent with our earlier research.
2. She _______________ a strange solid in her report.
3. _______________ my whole family, I’d like to extend my sincere gratitude for your help.
4. She_______________   other people’s feelings.
5. The government has promised to _______________ to help the unemployment.

6 . 选词填空

1. He __________ the importance of a good education from different aspects.
2. The idea __________ to him in a dream.
3. A terrible hurricane __________ the city last year.
4. The snow had ___________ , but the lake was still frozen solid.
5. He's gone to be__________ for a new suit.

7 . 方框中选择合适的单词或短语，并用其适当形式填空。

permit 　　　spot 　　　puzzle 　　　measure 　　　surround Keep one's word 　　　play a trick on tell a lie 　　　have fun with set off

1. The Gre＋ens live in an old house_________by a lot of tall trees.
2. One of the most_______things is how people in ancient times could move the huge stone by hand.
3. His plan of going swimming with his friends_______by his mother, which made him very happy.
4. With the rapid development of medical science, the lifespan may one day_______in centuries, rather than in years!
5. The famous actor glanced at the audience and______his wife and daughter in the second row.
6. The naught boy is fond of_______his classmates, which often makes them annoyed.
7. I hope that my sister who just returned home from abroad will______her friend at her birthday party this weekend.
8. We have to_______at dawn so that we could get to the coast before lunchtime.
9. You should have attended the important meeting, why didn’t you_________?
10. We all don’t like the people who always________, so please be an honest person.

8 . Directions: Fill in each blank with a proper word chosen from the box. Each word can be used only once. Note that there is one word more than you need.

A. consisted 　B. composing 　C. measures　 D. account　 E. patterns　 F. limitations G. moderately　 H. progressed　 I. distribution　 J. significantly　 K. complement

AI can distinguish between bots and humans based on Twitter activity

Artificial intelligence is being used to spot the difference between human users and fake accounts on Twitter.

Emilio Ferrara at the University of Southern California in the US, and his colleagues have trained an AI to detect bots on Twitter based on differences in     1     of activity between real and fake accounts.

The team analysed two separate datasets of Twitter users, which had been classified either manually or by a pre-existing algorithm as either bot or human.

The manually verified dataset     2     of 8.4 million tweets from 3500 human accounts, and 3.4 million tweets from 5000 bots.

The researchers found that human users replied four to five times more often to other tweets than bots did. Real users gradually become more interactive, with the fraction of replies increasing over the course of an hour-long session of Twitter use.

The length of tweets by human users also decreased as sessions     3    . “The amount of information that is exchanged diminishes,” says Ferrara. He believes that the change may result from a cognitive depletion over time, in which people become less likely to expend mental effort    4     original content.

Bots, on the other hand, show no changes in their interactivity or the length of information they tweet over time.

The team also analysed the amount of time between any two consecutive (连读的) tweets from a single user. When this     5     is plotted, bots showed spikes for certain time gaps, such as tweeting at 30-minute or 60-minute intervals.

The team then combined these     6     to train an existing bot-detection algorithm, called Botometer, on the difference in activity patterns. The AI was     7     more likely to accurately detect to fake accounts than when it was not taking into     8     the timing of posts.

The algorithm could be used to     9     other bot-detection tools that analyse the language within posts, says Ferrara.

One of the study’s     10     is that the Twitter data the team analysed is from three years ago. In that time, it’s possible that bots have become more human-like in their activity patterns.

9 . vocabulary

NEW YORK (Reuters) — U.S. factories shrugged off weakness in the global economy in November as manufacturing activity rose to its highest level in five months, a fresh sign the     1     economy was accelerating.

Recent data on consumer spending and private-sector job creation has also boosted optimism on the pace of growth.

“The economy seems finally to be     2    real momentum,” said Ian Shepherdson, an economist at High Frequency Economics in Valhalla, New York.

Also pointing to growth, automakers reported U.S. sales rose 13.9 percent in November from a year earlier, Autodata Corp said.

The Institute for Supply Management said on Thursday its index of national factory activity rose to 52.7 from 50.8 the month before, beating analysts’ expectations and showing the sector continues to     3    .

The added momentum, also apparent in the report’s details, reduces the chances the U.S. economy will slip into a new recession, even with an expected contraction in the euro zone.

Compared to a dismal first half of the year, the pace of U.S. growth more than     4    in the third quarter to a 2 percent     5     rate. While that remains subpar, economists believe activity will     6     even stronger in the final three months of the year.

The ISM     7     of new orders rose to its highest level since April, and the export index also improved, although modestly.

“That should keep some momentum going,” said Sean Incremona, an economist at 4Cast in New York. “It is good to see things are not getting worse now.”

Much of the     8     of the world, however, is getting worse, especially in Europe where policy-makers are fighting a raging sovereign debt crisis.