Just hang the towel _______ the back of the chair so that it will dry soon.
A. over B. behind
C. with D. from
高三英语单项填空中等难度题
Just hang the towel _______ the back of the chair so that it will dry soon.
A. over B. behind
C. with D. from
高三英语单项填空中等难度题查看答案及解析
Just hang the towel ______ the back of the chair so that it will dry soon．
A．over B．for C．with D．through
高三英语单项填空中等难度题查看答案及解析
Hang a wet towel in your hotel room —— because of climate-controlled rooms and windows that don’t open, the air _________ be very dry.
A. must B. can
C. shall D. need
高三英语单项填空困难题查看答案及解析
-- Oh, my god! I just missed the last bus back home.
-- That’s really bad. I’m sure you ____ it, but you were not in a hurry.
A. could catch B. had caught C. could have caught D. would catch
高三英语单项填空简单题查看答案及解析
--- Oh, my God! I just missed the last bus back home.
--- That’s really bad. I’m sure you ______ it, but you just didn’t hurry up.
A. had caught B. could have caught C. could catch D. can catch
高三英语单项填空中等难度题查看答案及解析
I had just stepped out of the bathroom and was busily drying myself with a towel __________ I heard the steps.
A. while B. when C. since D. after
高三英语单项填空中等难度题查看答案及解析
I thought it was just an ________ arrangement of chairs -I didn't realize it was an art exhibit!
A.arbitrary B.accurate C.abrupt D.acute
高三英语单项填空中等难度题查看答案及解析
It’s not just great minds that think alike. Dozens of the genes involved in the vocal learning that underpins human speech are also active in some songbirds(黄莺). And knowing this suggests that birds could become a standard model for investigating the genetics of speech production and speech disorders.
Complex language is a uniquely human trait, but vocal learning — the ability to pick up new sounds by imitating others — is not. Some mammals, including whales, dolphins and elephants, share our ability to learn new vocalizations(发声). So do three groups of birds: the songbirds, parrots and hummingbirds.
The similarities between vocal learning in humans and birds are not just superficial. We know, for instance, that songbirds have specialised vocal learning brain circuits that are similar to those that mediate(传达) human speech.
What’s more, a decade ago we learned that FOXP2, a gene known to be involved in human language, is also active in “area X” of the songbird brain — one of the brain regions involved in those specialised vocal learning circuits.
Andreas Pfenning at the Massachusetts Institute of Technology and his colleagues have now built on these discoveries. They compared maps of genetic activity in brain tissue taken from the zebra finch, budgerigar and Anna’s hummingbird, representing the three groups of vocal-learning birds.
They then compared these genetic maps with others taken from birds and primates that can’t learn new vocalisations, and with maps taken from the brains of six people who donated tissue to the Allen Brain Institute in Seattle.
Their results showed that FOXP2 is just one of 55 genes that show a similar pattern of activity in the brains of humans and the vocal-learning birds. Those same genes show different patterns of activity in the brains of animals incapable of vocal learning.
“The similarities are beyond one or a handful of genes,” says Pfenning. “There are just systematic molecular similarities between song-learning birds and humans.”
“There’s potential for songbirds to be used to study neurodegeneration(神经元退变) — especially conditions like Huntington’s,” says Pfenning. Huntington’s disease affects the ability to produce complex motor behaviour, such as singing and talking, so experiments with birds might implicate particular genes in the disease.
Constance Scharff at the Free University of Berlin in Germany, who helped identify the importance of FOXP2 for vocal learning in birds agrees that songbirds can make great models for human speech and its pathologies(病理学). “My lab’s research during the past 10 years has shown that FOXP2 is as relevant for birds’ song learning as it is for human speech learning,” she says.
1.Which of the following is WRONG according to the passage?
A. The songbirds, parrots and hummingbirds imitate humans.
B. FOXP2 is active in one of the brain regions of the songbird brain.
C. Songbirds have the same vocal learning brain circuits as human.
D. FOXP2 is a gene that is known to be involved in human language.
2.The underlined word “underpin” in the first paragraph probably means _______.
A. increase B. support
C. prevent D. decrease
3.What can we infer from the passage?
A. FOXP2 was involved in human language about 12 years ago.
B. Six people donated brain tissue to the Allen Brain Institute in Seattle.
C. Experiments with songbirds are likely to help cure Huntington’s disease.
D. Constance Scharff discovered at the Free University of Berlin.
4.What is the passage mainly about?
A. Birds have different genes from humans.
B. Humans and birds share the same singing genes.
C. How FOXP2 affects the brains of humans and birds.
D. Experiments with birds can cure the disease of humans.
高三英语阅读理解中等难度题查看答案及解析
― I’m sorry to bother you at this time of night.
― _________. It’s just so happened that I’m not engaged right now.
A. All right B. That’s OK C. You’re welcome D. Please don’t be bothered
高三英语单项填空中等难度题查看答案及解析
― I’m sorry to bother you at this time of night.
― _________. It’s just so happened that I’m not engaged right now.
A. All right B. That’s OK C. You’re welcome D. Please don’t be bothered
高三英语单项填空简单题查看答案及解析