2017中考英语阅读训练：Genome is a book

中考阅读理解是考生头疼的题型，很多考生在阅读理解上丢分严重，在平常大家要多做英语阅读理解训练，这样阅读理解的答题能力就能提高，下面学大教育网为大家带来2017中考英语阅读训练：Genome is a book，希望对大家提高英语水平有帮助。

Imagine that the genome (基因组) is a book. The book consists of 23 chapters with thousands of stories made up of paragraphs, words and letters on different levels. There are one billion words in the book, as long as 800 Bibles; if I read the genome out to you at the rate of one word per second for eight hours a day, it would take me centuries; if I wrote out the human genome, one letter per millimeter, my text would be as long as the River Danube. This is a huge volume, a book of great length, but it all fits inside an extremely small cell nuclear(细胞核) that fits easily upon the head of a pin.

The idea of the genome as a book is not, strictly speaking, even a metaphor. It is true to a great extent. A book is a piece of digital information, written in one-directional form and defined by a code that translates a small alphabet of signs into a large dictionary of meanings through the order of their groupings. So is a genome. The only difference is that all English books read from left to right, while some parts of the genome read from left to right while some from right to left, but never both at the same time.

While English books are written in words of different lengthens using twenty-six letters, genomes are written entirely in words of three-letter length, using only four letters, and instead of being written on flat pages, they are written on long chains of DNA molecules (分子).

The genome is a very clever book, because in the right condition it can both photocopy itself and read itself.

Help:

millimeter n. 毫米

digital adj.数字的

alphabet n. 字母表

以上内容就是学大教育网为大家带来的2017中考英语阅读训练：Genome is a book，希望大家能够认真进行练习，这样就能提高英语阅读理解能力。