A:黄连、蝉蜕等的药用
B:旅游资源
C:光合作用吸收CO2产生O2
D:种群的基因库的使用
计算: 48 + 3 ( 3 ﹣1)﹣30﹣| 3 ﹣2|.
⑴Happy New Year.____ A. It's red.
⑵What color is the car?____ B. Thank you.
⑶What is that?____ C. Happy New Year.
⑷This doll is for you.____ D. It's a ball.
⑸Would you like a pie?____ E. No, thank you.