When this biofilm was studied for its genetic material, some samples had high concentrations of a microbe called Mycobacterium avium, which can cause respiratory illnesses in some people. This bug is sometimes found in tap water, but there it is not hazardous. However, if it becomes an aerosol, like when bug-infested water is forced through a showerhead at high pressure, it can become dangerous because its tiny particles can be inhaled. Once they're in the lungs, they can start an infection.
This is not a problem for healthy people. However, people with weak immune systems or those at high risk of lung diseases may want to take protective measures. Unfortunately, cleaning the showerhead with bleach doesn't get rid of the danger because the microbes just come back with a fresh flow of water. To help lessen the chance of an infection, you can let the water flow out of the showerhead for a bit and also replace plastic showerheads with metal ones.
adapted from an article in The Economist, September 19, 2009
What is the author's purpose in writing this article?
Answer:
inform
Explanation:
Answer:
Explanation:inform
A. up
B. worms
C. surface
D. vibration
Answer:
No one really knows how he died.
Explanation:
He was on a trip when suddenly people found him in someone elses suit by the road. It is rumored that he was involved in a political scandal, or got rabies.
He'd be able to translate his own life experience into a theme.
He'd learn the fine art of writing poems.
none of these
He'd get experience working with rhyme.
Answer: first choice
Answer:
He'd get working with rhyme.
Explanation: