问题
解答题
一个成年人平均每分钟呼吸16次，每次吸入500立方厘米的空气．他在一昼夜里吸入8000立方厘米的空气．______．（判断对错）
答案
24×60×16×500，
=23040×500，
=11520000（立方厘米）；
所以他在一昼夜里吸入8000立方厘米的空气，是错误的．
故答案为：×．
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一个成年人平均每分钟呼吸16次，每次吸入500立方厘米的空气．他在一昼夜里吸入8000立方厘米的空气．______．（判断对错）
24×60×16×500，
=23040×500，
=11520000（立方厘米）；
所以他在一昼夜里吸入8000立方厘米的空气，是错误的．
故答案为：×．
The definition of pop music is always changing. Whatever, the most popular music at the time is called 1 music. 2 the early 1900s in America, the popular music was called Ragtime. People played it on piano and was very fast. Some of the songs had 3 and were easy 4 . Some of the songs were only music but were easy to dance, too. In the 1920s, a style called “crooning” was popular. Men sang it with a very gentle voice. In the 1930s and 1940s, “jazz” became popular. Jazz is often fast and people usually play it with a piano and horns. It wasn’t stopping 5 the 1950s when people created “rock and roll”. Elvis Presley is called the “King of Rock and Roll”. He had many popular songs throughout the years. Rock music changed as the years went 6 . Some different kinds of pop music in the 1960s were called Motown and beach music. In the 1960s, there was also a movement in the United States called the British Invasion. That was when the group The Beatles 7 popular. They were one of the most important 8 in American music history. Today, pop music can be Hip Hop, Rap, R & B, or Country. American young people 9 like listening to pop music. People 10 as Michael Jackson, Madonna and Britney Spears are some of the most well-known singers.
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