托福機(jī)經(jīng)作文
1 綜合
托福機(jī)經(jīng)閱讀：考古大發(fā)現(xiàn)啊~~恐龍骨頭里面發(fā)現(xiàn)了很多東西，證明來自于血管，血細(xì)胞，骨髓。
1 有breaking channel像血管，soft物質(zhì)遺留物
2sphere with iron是紅細(xì)胞的，
3collagen是骨髓里面的重要物質(zhì)
Listening:
Lecturer認(rèn)為托福機(jī)經(jīng)閱讀中的證據(jù)Skeptical。
(1) The material found in the breaking of the bone can not prove the existence of red blood vessel. It is more likely to be other material such as the reddish mineral.
(2) Sphere also appears in other animals that do not have bone tissues. For example, it may be the traces left by the bacteria colony that lived in the bone leg after the dinosaur died.
(3) Collagen can not remain as long as a period of 70 million years. So it is more that the collagen comes from other recent sources such as the human skin of some researcher who handled this bone leg before.