A. I'd like some carrots and fish.
B. I'd like some juice and chicken.
C. I'd like some rice and vegetables.
D. I'd like some beef and bread.
要除去密闭容器内空气中的氧气,并不混入其他气体,在其中可以燃烧的可燃物应选( )
1914年,“一粒火星”引燃了第一次世界大战.这“一粒火星”是指( )