Look closely at your hands. Are
they clean? It doesn't matter how many times you wash your hands, tiny microbes
(微生物) still
stay on them. But don't worry. Most microbes don't harm you.
Now scientists say the microbes
on our hands could be used in a surprising way; fighting crime, According to a
recent survey microbes as well as fingerprints(指紋) could be used to indentify the criminal.
Everyone has his own set of
microbes on the hands. That is to say, if you and your best friend were able to
see and compare all the microbes on your hands, your hands probably would look
different. Some microbes only show up on your hands while others live only on
your friend's hands.
When you work on a computer you
leave the microbes from your hands on the keyboard. The scientists can easily
tell the owner of the keyboard by looking at the microbes on it. Even if you
don't leave your fingerprints behind, your microbes may give you away.
Noah Fierer, a scientist, says.
"You can only clean a fingerprint, but you can't sterilize (使無菌) a surface just by
wiping(擦) it off," He says that scientists have a
lot more work to do before the microbe is used as a useful tool.
1.According to the passage,_______ could be
used to identify the criminal.
A. fingerprints B.
scientists' hands
C. microbes D.
fingerprints and microbes on people's hands
2.Paragraph 3 tells us that________.
A. our hands look similar B.
the microbes will make the keyboard dirty.
C. we should compare hands
often D. we have our own sets of microbes.
3.When you work on computer, the microbes________.
A. just stay on our hands B. also
stay on the keyboard
C. will do harm to you D. will
disappear
4.From Noah Fierer we know that________.
A. fingerprints are no longer
useful in fighting crime
B. microbes can be found on
everyone's hands.
C. unlike microbe fingerprints
can be cleaned if people wipe them
D. the microbe is used as a
useful tool
5.What’s
the best title of the passage?
A. Microbes May Tell Who You Are B.
Scientists Say Everyone Has Microbes
C. Noah Fiercer Does Research
Into Microbes D. Fingerprints Help Catch Criminals