托福機(jī)經(jīng)作文:
綜合: 文章講到一種叫l(wèi)embeosaurs的恐龍,有一個(gè)crest(冠)在頭上,這個(gè)crest 有三種用處,第一,幫助嗅覺(jué),因?yàn)榘l(fā)現(xiàn)crest里頭有很多blood vessels,這個(gè)構(gòu)造跟當(dāng)代一種嗅覺(jué)發(fā)達(dá)的動(dòng)物很像。 第二, 通過(guò)extra area that can help them cool down rapidly.作者拿出另一個(gè)s 開(kāi)頭的恐龍,說(shuō)明這個(gè)道理。 第三,這個(gè)crest 能make sounds for them to communicate, 因?yàn)榭茖W(xué)家發(fā)現(xiàn)他們有很好的聽(tīng)覺(jué),所以他們需要交流,故crest 有這個(gè)用處。 但是聽(tīng)力中,教授反駁, 1,雖然crest上有很多血管,但是這種恐龍的大腦太小了,不能process the information efficiently.所以跟大腦不配對(duì),故不可能。 2. 跟另外一種龍相比,crest部分的皮膚is too small to make a difference in cooling them down. 3. fossils found that only 1 species of the lembeosaur had developed a sphisticated sound ability, others may not, 因此證據(jù)不夠,綜上所述,這個(gè)crest到底有啥用,還不清楚。
獨(dú)立:do you agrre or disagree with the statement, although a lot of people know the environmental situation ( global warming etc) the present situation is unlikely to change in the future,

