MIT has posted online all 1800 courses offered at the university. Any they’re free. Please visit and support this incredibly generous gift from the world’s premier science institution.Searchable Asteroid Database Everyone can use Sander Pool’s excellent searchable database website to find Asteroi...
In advanced optics courses, a cartesian sign convention is used in which all things to the left of the lens are negative, all those to the right are positive. When this is used, the lens equation must be written 1/p + 1/f = 1/q. (The sign of the 1/p term is opposite that in...
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Off er expires 04/07/18 THEGREATCOURSES.COM/9ASTR 1- Online Content Code: ASY1803 Enter this code at: MARCH 2018 to gain access to web-exclusive content VOL. 46, NO. 3 H C E T L A C - L P J / A S A N ON THE COVER The Cassini-Huygens mission produced an amazing new ...
Now about one third of the countries in the world are doing research on UFOs, about which many books and journals have been published, and in some universities courses are even set up to study UFOs. 名师点睛 1.文章体裁:说明文。 2.行文逻辑:介绍 UFO→人们的看法→研究状况。 3...
There is a small cross by the side of Highway 128, near the town of Boonville. If this cross could talk, it would tell you this 16 story: Seven years ago my brother, Michael, was at a friend ' s far. They decided to go out for dinner. Joe arrived and 17 to drive —...
teach how to take new courses by Internet C. present new means to learn something you want to know D. help you to solve any difficulty you meet with 42. "How-to" sites are set up to A. explain FAQs to the public B. help people to learn what they want to C. tell their...
B. teachhowto take new courses by Internet C. present new means to learn something you want to know D. help you to solve any difficulty you meet with 42. "How-to" sites are set up to A. explain FAQs to the public B. help people to learn what they want to C. tell their differe...
teach how to take new courses by Internet C. present new means to learn something you want to know D. help you to solve any difficulty you meet with 42. "How-to" sites are set up to A. explain FAQs to the public B. help people to learn what they want to C. tell ...