drift
A. n. （除星期日外每日发行的）日报；（不寄宿的）仆人；adj. 每日的；日常的；每个工作日的；按日的
B. n. 牛奶场；乳品场；乳品公司；乳品店；（当地的）小商店，小店铺；adj. 牛奶的；奶制的；乳品的；乳品业的；生产乳品的
C. n. 流动；趋势；逐渐变化（尤指向坏的方面）；（船只或飞机的）偏航，航差；v. 漂流；漂移；缓缓移动；缓慢行走；无意间发生；无目的地转变
D. n. 水坝；拦河坝；母兽；（尤指）母马，骒马；v. （在河上）筑坝
rare
A. n. 烈性酒，含酒精饮料
B. n. 一览表，名单，目录，清单；（船的）倾斜；v. （按某次序）把……列表，列清单，拟订清单；列举，把……列入一览表；（被）列入销售清单，列入价目表；（向一侧）倾斜
C. adj. 稀少的，稀罕的；珍贵的；半熟的，半生的
D. adv. 按字面，字面上；（强调事实可能令人惊讶）真正地，确实地；（加强即使字面意义并不真实的词语）简直
The finance minister has not been so（ ） since he raised taxes to an unbearable level.
A. famous
B. favorable
C. popular
D. preferable
forecast
A. n. 大使馆；（统称）使馆官员；大使馆（指馆舍）
B. n.（天气、财经等的）预测，预报；预想；v. 预报，预测；预示；预言；进行预报，作预测
C. v. 把……牢牢地嵌入（或插入、埋入）；派遣（战地记者、摄影记者等）；嵌入
D. v. 具体表现，体现，代表（思想或品质）包括；包含；收录
Mother who takes care of everybody is usually the most （ ）person in each family.
A. considerate
B. considerable
C. considering
D. constant
Rats and other animals need to be highly attuned to social signals from others so they can identify friends to cooperate with and enemies to avoid. To find out if this extends to non-living beings, Loleh Quinn at the University of California, San Diego, and her colleagues tested whether rats can detect social signals from robotic rats.
They housed eight adult rats with two types of robotic rat — one social and one asocial — for four days.
The robots rats were quite minimalist, resembling a chunkier version of a computer mouse with wheels to move around and colorful markings.
During the experiment, the social robot rat followed the living rats around, played with the same toys, and opened caged doors to let trapped rats escape. Meanwhile, the asocial robot simply moved forwards and backwards and side to side.
Next, the researchers trapped the robots in cages and gave the rats the opportunity to release them by pressing a lever.
Across 18 trials each, the living rats were 52 percent more likely on average to set the social robot free than the asocial one. This suggests that the rats perceived the social robot as a genuine social being. They may have bonded more with the social robot because it displayed behaviors like communal exploring and playing. This could lead to the rats better remembering having freed it earlier, and wanting the robot to return the favour when they get trapped, says Quinn.
The readiness of the rats to befriend the social robot was surprising given its minimal design. The robot was the same size as a regular rat but resembled a simple plastic box on wheels. “We’d assumed we’d have to give its moving head and tail, facial features, and put a scene on it to make it smell like a real rat, but that wasn’t necessary,” says Janet Wiles at the University of Queensland in Australia, who helped with the research.
The finding shows how sensitive rats are to social cues, even when they come from basic robots. Similarly, children tend to treat robots as if they are fellow beings, even when they display only simple social signals. “We humans seem to be fascinated by robots, and it turns out other animals are too,” says Wiles.
（1）Quinn and her colleagues conducted a test to see if rats can （ ）.
（2）What did the asocial robot do during the experiment?
（3）According to Quinn, the rats released the social robot because they （ ）.
（4）James Wiles notes that rats（ ）.
（5）It can be learned from the text that rats（ ）.
第 1 问
A. pick up social signals from non-living rats
B. distinguish a friendly rat from a hostile one
C. attain sociable traits through special training
D. send out warning messages to their fellows
第 2 问
A. It followed the social robot.
B. It played with some toys.
C. It set the trapped rats free.
D. It moved around alone.
第 3 问
A. tried to practice a means of escape
B. expected it to do the same in return
C. wanted to display their intelligence
D. considered that an interesting game
第 4 问
A. can remember other rat’s facial features
B. differentiate smells better than sizes
C. respond more to actions than to looks
D. can be scared by a plastic box on wheels
第 5 问
A. appear to be adaptable to new surroundings
B. are more socially active than other animals
C. behave differently from children in socializing
D. are more sensitive to social cues than expected
The Japanese dollar-buying makes traders eager to（ ）dollars in fear of another government intervention.
A. let in
B. let out
C. let go of
D. let off
competition
A. n. 故障，损坏；（关系的）破裂；（讨论、系统的）失败；数字细目；分类；分解
B. n. 早餐；早饭；v. 吃早餐
C. n. 竞争；角逐；比赛；竞赛；竞争者；对手
D. n. 乳房，胸部；胸怀；心情；v. 以胸对着；与……搏斗