下列关于燃烧与灭火的说法,正确的是( )
A:放在空气的木桌椅没有燃烧,是因为木桌椅不是可燃物
B:防止森林大火蔓延,开挖隔离带,是为了将可燃物与火隔离
C:油锅着火,用锅盖盖上,是为了降低可燃物的温度
D:住房失火,消防队员用水扑灭,是为了降低可燃物的着火点
例:5:30 p.m.
It's 5:30 p.m. They are playing football.
若1-2x2011=a0+a1x+a2x2+⋯+a2011x2011x∈R,则a0+a1+a0+a2+⋯a0+a2011=( )
根据句意,写出括号内所给单词的适当形式。It's my cousin's ____ (twenty) birthday next week.The weather in Nanjing is ____ (pleasant) in summer. It's always too hot.People screamed with____ (excite) when the match began.He was so tired that he fell____ (sleep) soon after he went to bed.