下列植物种子的结构与菜豆种子最相似的是( )
A:玉米
B:花生
C:小麦
D:银杏
—Nero is crying. Do you know _______ she's so upset?
—Well, she lost her pet cat which was just like her family member.
先化简,再求值: 12 x﹣(2x﹣ 23 y2)+(﹣ 32 x+ 13 y2),其中x=﹣ 14 ,y=﹣ 12 .
用计算器计算:13﹣3.14≈____ (结果保留三个有效数字).