题目

小亮用天平称得一个罐头的质量为，用四舍五入法将2.026精确到0.01的近似值为（ ）A. 2 B. 2.0 C. 2.02 D. 2.03 答案：【答案】D【解析】根据近似数的精确度，把千分位上的数字6进行四舍五入即可得，2.026≈2.03，故选D．We are naturally drawn to friends and colleagues with familiar voices, scientists have found. People prefer those who have a similar accent, intonation and tone of voice to themselves, they discovered.Previous research has focused on how male or female a voice sounds. Men with deeper voices and women with slightly higher voices were thought to sound more attractive, because they suggest a bigger or a smaller body.But the new study, published by a linguistics expert in Canada, suggests there is a more complex mechanism (机制) at play. Dr Molly Babel, from the University of British Columbia in Canada, said, “The voice is an amazingly flexible tool that we use to construct our identity. Very few things in our voices are changeless, so we felt that our preferences had to be about more than a person’s shape and size.”She recorded 30 volunteers’ voices and asked each to rate the others’ attractiveness on a range from one to nine. Each participant was from western America, with similar accents. The people we assessed were all in the same dialect group, but they showed that dialect to different degrees.“We seem to like people who sound like we sound, and we like people who fit within what we know,” Dr Babel said. She also found that breathy voices in women—typified by the famous American actress Marilyn Monroe-were seen as more attractive.The breathy tone, caused by younger and thinner vocal cords (声带), implied youthfulness and health. A creaky (咯吱作响的) voice, suggesting a person has a cold, is tired or smokes, was seen as unattractive. The participants preferred men who spoke with a shorter average word length and deeper voices.【1】The main purpose of the text is to .A. compare male voices with female voicesB. inform readers of the new findings of voicesC. argue against women’s voices of speakingD. encourage men to use deeper voices to speak【2】Dr Molly Babel mentions Marilyn Monroe in order to .A. explain a breathy voiceB. introduce a creaky voiceC. challenge previous researchD. promote her reputation【3】In terms of voice preferences, the new findings stress .A. body size and shapeB. shorter word lengthC. thicker vocal cordsD. the same social groups【4】Whose voice may be unattractive according to the text?A. A young lady with a thin voice.B. An old lady with a silvery voice.C. A deep-voiced man with a dry throat.D. A little man with a quiet and gentle voice.