A：保证工程质量
B：保证工程进度
C：保护生态环境
D：节约工程成本
- Do you know the song Where has the time gone?
- Sure. It ________ beautiful. I like it a lot.
诺贝尔奖获得者屠呦呦发现的青蒿素，化学式C15H22O5，下列关于青蒿素的说法错误的是（ ）
下列关于哲学与世界观的关系认识正确的是（ ）
选出相对应的答句。
①What size do you want? ____ A. Yes, she does.
②Does Lulu like rabbits? ____ B. He's a farmer.
③What's your father do? ____ C. Size 25, please.
④Do you have any shoes? ____ D. Yes, I am.
⑤Are you a teacher? ____ E. Yes, we do.
