下列关于生物与环境关系的说法中，最为确切的是（   ）

图一表示某生态系统中的食物网；图二是某条食物链中三种生物体内所含有机物总量（可理解为生物数量）的直方图。请据图回答问题：

(1)作为一个完整的生态系统，图一中缺少的成分是____ 和____ 。
(2)图一的食物网由____ 条食物链组成。
(3)请写出最长的食物链：____ ，若图二中甲、乙、丙分别表示草→鼠→猫头鹰这条食物链中三种生物的有机物总量，则丙对应的生物是____ 。
(4)若该系统的土壤中含有某些难以分解的有毒物质，则体内有毒物质积累最多的生物是____ 。
(5)若图一中蛇的数量大量减少，则鼠的数量会____ 。

大豆种子和玉米种子的营养物质分别贮藏在
①胚    ②子叶      ③种皮      ④胚乳

使用显微镜时，对光结束后从目镜内看到的视野应该是（  ）

    The lion says that he is________So he asks all the animals to come and listen to his last wishes.

    The cat comes to the lion's cave(洞穴). He stands there and goes in. Then a sheep goes in. Before she comes out, a rabbit goes in to hear the last wishes of the king of animals.

    But soon the lion looks well again, and goes out of his cave. He sees a fox(狐狸) waiting outside. “Why don't you come in?” asks the lion to the fox.

    “I beg your pardon,” says the fox, “I see many animals go into your cave, but nobody comes out. Before they come out again, I will wait outside.”