The history of knife forging by Achang people already has been over _______ years.
A: 500
B: 600
C: 700
D: 800
A: 500
B: 600
C: 700
D: 800
举一反三
- Lunar New Year painting in Gaomi has a history of more than________. A: 800 years B: 900 years C: 600 years D: 500 years
- 步兵机器人最大伸展尺寸（mm）为（） A: 500*500*400 B: 600*600*500 C: 700*700*600 D: 800*800*700
- The number of people aged 60 years and over has tripled since 1950 globally, reaching 600 million in 2000 and surpassing ______ million in 2006. It is projected that the combined senior and geriatric population will reach 2.1 billion by 2050. A: 650 B: 700 C: 750 D: 800
- 落地整齐陈列：将商品整齐堆积在一起，原则上地堆长（）mm，高（）mm，宽（）mm。 A: 500；700；800 B: 600；600；700 C: 700；800；500 D: 800；500；600
- 人体全身约有多少个淋巴结( ) A: 400~500 B: 500~600 C: 600~700 D: 700~800