Q000000508
更新 2026-06-25
1.
下列我国古代发明及应用中，不涉及化学变化的是
Q000000470
更新 2026-06-25
2.
化学已经渗透到社会生产生活的各个领域。下列领域中，化学具有的重要作用是
①环境保护；②能源开发利用；③新材料研制；④粮食增产
①环境保护；②能源开发利用；③新材料研制；④粮食增产
Q000000522
更新 2026-06-25
3.
阅读下面短文，在空白处填入 1 个适 当的单词或括号内单词的正确形式。
Every young person has dreams. Some want to be chefs, others hope to become
Many successful people started just like you. A famous chef might have begun by
The path isn’t always easy. You’ ll need to
Hold on to your dreams. With your special skills, you can