He's a fashion designer who's always swum against the stream;his work is very ________.
A:original
B:ridiculous
C:contemporary
D:abnormal
“厉行勤俭节约,反对铺张浪费”势在必行,最新统计数据显示,中国每年浪费食物总量折合粮食大约是210000000人一年的口粮.将210000000用科学记数法表示为( )