possibly around 1050 CE, people began suspending the lodestones to allow them to move freely and use them for navigation. A description of a magnetized needle and its use among sailors occurs in a European book written in 1190, so by that time, it...
Which of these inventions is the most important? 这些发明中哪个最重要? It’s difficult to say. 很难说。 They’ve all changed people’s lives. 它们都改变了人们的生活. I love my mobile phone because I can use it anywhere....
Ch 15.The Great Depression (1929-1940) Ch 16.The US in World War ll... Ch 17.Post-War World (1946-1959) Ch 18.The Cold War (1950-1973) Ch 19.Protests, Activism and Civil... Ch 20.The 1970s (1969-1979) Ch 21.The Rise of Political Conservatism... ...
Woodlandfirstdevelopedanearlyformofthebarcodein1949bycombiningideasfrommoviesoundtracksandMorsecodetohelphimspeedupstorecheckouts.Andnowstorescaninstantlyaccessproductdetails,pricesandstocklevelswithasweepofalaser.TVDinners:Conveniencefoodreallytookoffinthe1970sandtransformedthewayfamiliesatemeals,thehigh-street,the...
In the 1970s and 1980s, pro football's Dallas Cowboys team used it to line players' helmets to reduce the trauma of impact on the field. Shoe manufacturers have called on the foam to create special high-comfort insoles. In hospitals, mattress pads and wheelchair seats made from the foam ...
In the 1970s and 1980s, pro football's Dallas Cowboys team used it to line players' helmets to reduce the trauma of impact on the field. Shoe manufacturers have called on the foam to create special high-comfort insoles. In hospitals, mattress pads and wheelchair seats made from the foam ...
down and cut supply, more than a third of America’s gas came from abroad. So, as availability evaporated and prices skyrocketed, it caused gas lines, business closures and lifestyle changes. Blocks-long lines at gas stations are as iconic an image of the 1970s as cardigans and flared ...
(use) to people.Together,the Internet and the World Wide Web have changed the world. The Internet(2) was invented(invent)by the US government in the 1960s,for the army to use.In the 1970s,scientists and business people also wanted to use the Internet(3)...
Cable modems are primarily used to deliver broadband Internet access in the form of cable Internet, taking advantage of the high bandwidth of a HFC and RFoG network. They are commonly .. Read More.. Search Engine Invented By : Alan Emtage Invented Year : 1990 Category : Computing ...
17.B.细节理解题. 由文中The first modern computer was invented in America in 1946. It was as big as a room. It improved the speed and exactitude of calculation (计算). In the 1950s, desktop computers were invented in the same country.由此可知,台式电脑最开始由美国的科学家发明出来.故选B...