下列关于果实和种子的叙述正确的是()
A:葵花籽是由珠被发育而来的
B:西瓜子的外壳是由子房壁发育而来的
C:花生的果皮是由珠被发育而来的
D:玉米的胚乳是由受精极核发育而来的
图表理解 阅读下列图表,从每题所给的A、B、C三个选项中,选出最佳选项回答问题或完成句子。
Theme Parks
Universal Studios(环球影城)
— a dream land for
Hollywood movie fans
The history of movies, the live shows and film tricks(技巧)can be found here and it has parks in the USA, Japan and Singapore.
Legoland
— a world made of
Lego bricks(乐高积木)
You'll be sent back to your childhood time by the buildings and dolls made of Lego bricks and there are seven Legoland parks in the world and the one nearest to us is in Malaysia.
Ferrari World
— a paradise(乐园)for
car lovers
You can experience the feeling of driving a Ferrari(法拉利)car and see how Ferrari's racing cars are produced in Abu Dhabi.
阅读下面的古诗,完成小题。
武陵春
李清照
风住尘香花已尽,日晚倦梳头。物是人非事事休,欲语泪先流。
闻说双溪春尚好,也拟泛轻舟。只恐双溪舴艋舟,载不动许多愁。
一个20°的角,透过放大3倍的放大镜看,这个角是60°.(判断题)
如图,二次函数y=ax2+bx+c的图象经过点(﹣1,0)、(3,0)和(0,2),当x=2时,y的值为____ .