A:分封制度
B:世袭制度
C:中央集权制度
D:宗法制度
根据括号中所给的汉语写出单词,使句子意思完整正确。①It’s my cousin’s ____ (第十) birthday next week.②My grandpa always ____ (看) sports news if he is free.③Donations are welcome ____ (在……期间) the charity show that will be held in our school.④You look so tired. Why not stop for a good____ (休息)?⑤I like to keep my window open in the morning. I want to let the____ (新鲜) air in.
青少年要培养自己的创新能力,就要( )
①重视文化知识的学习和积累,为创新奠定坚实的知识基础 ②养成爱科学、学科技、用科技的良好习惯
③通过小制作、小发明等活动提高自己的创新能力 ④善于观察,敢于质疑,培养好奇心和求异思维