1 There are three versions of the oral glucose tolerance test: the 1-hour test, the 2-hour test, and the 3-hour test.  In the eight hours leading up to the test, you should not eat food or drink any beverages aside from water.
Ecosia is a search engine that uses 80% of its profits from ad revenue to plant trees. By searching with Ecosia you can help the environment for free. This extension adds Ecosia.org as the default search engine to your Firefox browser. Give it a try! Install state for Ecosia â The search engine that plants trees! is unknown.
Parts of How Search Engines Work. There are 3 parts to a search engine: 1  The search engines use robots (also known as spiders) to search the internet for websites. 2  The results of the spiders' travels are put in an database which is then indexed based on words found and where these words were found.