A:非公有制经济
B:混合所有制经济
C:集体经济
D:公有制经济
用显微镜观察生物体时,所需观察的材料必须是( )
根据句子意思及所给的词首字母或汉语提示,完成下列单词。 ——E____ me, Are you Mr. Green?——Yes, I am. Jane and Amy are s____ . Their mom is a teacher. Maria and Jane b____ have long hair. I have a friend. He is____ (二十) years old. His____ (手) are big.
动物与其对应的结构,不匹配的是什么( )