A:What did you see in the animal museum?
B:What can you see in the museum?
C:What did you see in the palace museum?
(I)求A;
(Ⅱ)若BC边上的中线AM=2 2 ,高线AH= 3 ,求△ABC的面积.
中国民主革命的先行者是____;被誉为“两弹元勋”的是____。
下列种子中属于有胚乳种子的有 ( )
①小麦 ②玉米 ③南瓜④大豆 ⑤花生 ⑥水稻