张老师带着小冬和小明去采集动物标本。不一会儿,就在草丛中,石块、树叶下,采到不少旱螺蛳——蜗牛。小冬好奇地问张老师:“蜗牛是一种什么动物?它们吃些什么东西?”张老师说:“蜗牛是生活在陆地上的一类软体动物。现在世界上已经知道的蜗牛约有二万五千多种,形状也各式各样。它们主要吃绿色植物的幼芽、嫩叶,也吃一些地衣、蘑菇等,尤其喜欢吃香甜的食物。”他指着正在叶子上吃食的蜗牛说:“你们看,蜗牛吃东西是利用颚片固定住食物,然后 Zhang took Xiao Dong and Xiao Ming to collect animal specimens. A moment later, just in the grass, stones, leaves, to get a lot of snail - snail. Xiao Dong curiously asked Zhang: ”What kind of animal is a snail? What are they eating?“ Zhang said: ”The snail is a kind of mollusk living on land. Now the snail around the world is already known There are more than twenty-five thousand kinds, all kinds of shapes, and they mainly eat sprouts of green plants, young leaves, and eat some lichens, mushrooms, etc., especially like to eat sweet food. “He pointed at the leaves Snails eating: ”You see, snails eat food is fixed by the jaws, and then