faustino64 Forum Index

faustino64

faustino64

PortalPortal  blogBlog  AlbumAlbum  UsergroupsUsergroups  MemberlistMemberlist  GBGuestbook  User PanelUser Panel  RegisterRegister 
 FlashChatFlashChat  FAQFAQ  SearchSearch  Log in to check your private messagesLog in to check your private messages  StatisticsStatistics  LinksLinks  Log inLog in 
 CalendarCalendar  DownloadsDownloads  Comments to your karmaComments to your karma  ToplistToplist  Recent topicsRecent topics  Voting forumVoting forum

While many jobs can be accomplished with
Users browsing this topic:0 Registered, 0 Hidden and 0 Guests
Registered Users: None


 
Post new topic   Reply to topic    faustino64 Forum Index -> Forum di prova
View previous topicEmail to a Friend.Users who have viewed this topicSave this topic as a txt filePrintable versionLog in to check your private messagesView next topic
Author Message
zhouyueyue

Appassionato
Appassionato


Iscritti



Joined: 18 Jun 2019
Posts: 247
zhouyueyue is offline 







italy
PostPosted: 21 Nov 2019 07:07:39    Post subject:  While many jobs can be accomplished with
Description:
Reply with quote

50 years later more than one hundred of thousands of terrestrial biology from the Earth. Because of the impact of human activities
Only registered users can see links on this board!
Get registred or enter the forums!
, than the natural extinction of species extinction rates 1,000 times faster, on average there is one species extinction per hour.

Biological evolution in a long, long-term stability of the dramatic changes of always short-term alternating with extinction also occurs at different scales. In a stable period, the average new rate far greater than the average extinction rate, the total average extinction rate remains at a low level, such a low level of extinction is called background extinction; Correspondingly
Only registered users can see links on this board!
Get registred or enter the forums!
, in the upheaval of many biological categories extinction in the short term, a sudden interruption of the process of biological evolution, so that a sudden increase in extinction rate, while the new rate is down so low, this is called mass extinction mass extinction or major extinction.

According to statistics, since the Cambrian has been significant extinction event 15 times. Of which there are 5 major mass extinction. Scientists have been studying the causes and patterns of extinction and made a variety of explanations, such as meteorite impacts
Only registered users can see links on this board!
Get registred or enter the forums!
, cosmic rays and strong, volcanic eruptions, climate change, atmospheric composition changes, changes in ocean salinity, geomagnetic changes. The previous mass extinctions are a natural disaster, but the 6th is artificial. "We are going through the history of extinction of life on Earth other than the extinction of the incident even worse." Some experts say.

The number of species around the world do? Some said that 1.5 million kinds
Only registered users can see links on this board!
Get registred or enter the forums!
, and some say 1.7 million kinds of even two million kinds. These figures refer to the known species, there are many species we have not found the actual figure will be far greater than now.

The World Conservation Union (IUCN) released every few years the situation of a global species, Red Book, the most recent Red List of species have 15,589 species are threatened with extinction. Including 12% of bird species, 23% of mammals, 32% of amphibians
Only registered users can see links on this board!
Get registred or enter the forums!
, 25% of the gymnosperms, cycads 52%, 42% of the turtles, sharks and rays of 18%, 27% of East Africa freshwater fish.

5 major threat to biodiversity

Why so serious global environmental situation? Experts concluded the following 5 main reasons: First, habitat loss or fragmentation; second, invasion of exotic species; Third
Only registered users can see links on this board!
Get registred or enter the forums!
, environmental pollution; the fourth, a population explosion; Fifth, over-exploitation.

To understand the danger of species extinction has much, we must first understand its genetic diversity. Such as two grass looked like, not tell to the naked eye, but they are no doubt on the genetic basis of distinction, and this is the uniqueness of the individual
Only registered users can see links on this board!
Get registred or enter the forums!
, and now we can high-resolution molecular markers to distinguish individuals. Yuan Longping you are familiar with the contribution of rice production on the increase, but if you do not do very hard to find wild rice hybrid, he can not have the present results; dwarfing gene on the promotion of China's grain output, also played a very crucial effect.

In this sense, a gene may change a country's economic situation. Because in an ecosystem, each species has its own special features. Extinction of a species each, there are several dozens of species of living affected.
Tips For Bathroom Plumbing Home Business Articles | April 23
Only registered users can see links on this board!
Get registred or enter the forums!
, 2010
For many simple plumbing jobs, hiring a professional can mean added stress and costs. However, with the right know-how and a little elbow grease, you may find that many small to moderate sized jobs come with ease.


To begin, it is important to note that in some states, laws are in place which prohibits home owners from engaging in their own bathroom plumbing. Check with your local municipality to make sure there aren't any restrictions against this practice in the area were you reside.

In any plumbing job, safety is the key. Be sure to disconnect the electrical source by turning off the power to a fuse or breaker box. Wear goggles
Only registered users can see links on this board!
Get registred or enter the forums!
, headgear, and gloves. Tools have insulated handles so hold them by the handles to reduce injury or electrical shock. Likewise, rubber-soled shoes should be worn at all times.

Though no job is the same it is important to have a few basic tools. Below are a few of the most commonly used.

1. Pipe Wrenches ? You'll need an 18-inch, 14-inch, and 10-inch.
2. Basic Wrenches ? In order to make gripping faucet attachments easier be sure to pick up a few with swivel jaws and long handles.
3.Tubing Cutters ? Get yourself a standard-sized model as well as a mini in order to ensure you'll be able to cut through pipes even in tighter spaces.
4. Plunger ? One with a heavy rubber head and good suction.
5. Level ? To ensure pipes are level.
6. Torch ? In case you need to solder pipes. A low cost simple torch should usually do the trick.
7. Drill ? You'll always find a use.
8. Magnet ? To help remove metal objects from clogged drains.
9. Cola is useful for removing rust.
10.Wire Brush - Helps remove debris prior to soldering pipes.

Aside from clogged sinks and toilets, one of the biggest bathroom plumbing problems are frozen pipes. Frozen pipes can damage your home by bursting and effectively flooding your home in minutes. Be sure to regularly inspect all outdoor pipes as well as those under sinks and in unheated crawl spaces. Preventing this problem is fairly simple and consists of covering the pips with foam rubber or insulation and securing the job with tape. If you've found a pipe to have already frozen, make sure to open the faucet prior to thawing in order to allow the blockage to move out through the pipes.

While many jobs can be accomplished with little more than common sense
Only registered users can see links on this board!
Get registred or enter the forums!
, there will always be those t.
Only registered users can see links on this board!
Get registred or enter the forums!
Only registered users can see links on this board!
Get registred or enter the forums!
Only registered users can see links on this board!
Get registred or enter the forums!
Only registered users can see links on this board!
Get registred or enter the forums!
Only registered users can see links on this board!
Get registred or enter the forums!
Only registered users can see links on this board!
Get registred or enter the forums!
Only registered users can see links on this board!
Get registred or enter the forums!
Only registered users can see links on this board!
Get registred or enter the forums!
Only registered users can see links on this board!
Get registred or enter the forums!
Only registered users can see links on this board!
Get registred or enter the forums!
Back to top
View user's profile Send private message
Adv



PostPosted: 21 Nov 2019 07:07:39    Post subject: Adv






Back to top
Display posts from previous:   
Post new topic   Reply to topic    faustino64 Forum Index -> Forum di prova All times are GMT + 1 Hour
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You cannot download files in this forum





faustino64 topic RSS feed 
Powered by MasterTopForum.com with phpBB 2003 - 2008