玻璃钢的密度一般为1.65-2.0g/cm3,约为钢的()。
参考答案:1/4
下列词语中加点字的读音全不相同的一组是 ( )
A.惟悴粉碎猝不及防出类拔萃
B.啜泣拾掇缀玉连珠笔耕不辍
C.翌日肄业苦心孤诣雄关险隘
D.追悼泥淖绰绰有余掉以轻心
Every minute about ____ babies are born in the world, so the world’s population is increasing by _____million every year.
A.256 ; 8
B.256; 80
C.261 ; 8
D.261; 80