动植物体结构层次上的最大不同之处是（    ）

魏巍的报告文学《谁是最可爱的人》，1951年4月11日在《人民日报》刊登，影响了几代中国人，书中对于中国人民志愿军的故事应该取材于下列哪一时期（    ）

    It is a hot day in summer. A lion is walking along a lake. He is looking for something to eat. He is very hungry. A duck is swimming in the river. The lion is very excited to see him. ‘Aha, there is my lunch,' the lion says to himself.

    "Hello, Mr Duck!" "Go away, bad lion!" says the duck. "I have good news for you." "What is it?" asks the duck. "I don't want other animals to hear it. Please come here." says the lion. The duck swims out of the river and runs to the lion. The lion eats him up quickly.

下列腺体中，属于内分泌腺的一组是（　　）

阅读下面材料，回答问题。

某初中学校以“你喜欢到电影院看电影吗”为主题随机调查了200名学生，以下是调查的数据统计。