雅思阅读模拟试题精选

雅思阅读模拟试题精选

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雅思阅读模拟试题精选

1. Washing

，

brushing and varnishing

fossils

—

all standard conservation

treatments used by many fossil hunters and

museum

curators

alike

—

vastly

reduces

the

chances of recovering ancient DNA.

2. Instead

，

excavators should be

handling

at

least

some

of

their

bounty

with

gloves

，

and freezing samples as they are

found

，

dirt

and

all

，

concludes

a

paper

in

the Proceedings of the National Academy of

Sciences today.

3. Although many palaeontologists know

anecdotally that this is the best way to up

the

odds

of

extracting

good

DNA

，

Eva-Maria

Geigl of the Jacques Monod Institute in

Paris

，

France

，

and

her

colleagues

have

now

shown just how important conservation

practices can be. This information

，

they

say

，

needs to be hammered home among the