A:防御行为
B:攻击行为
C:节律行为
D:繁殖行为
表中列出几种物质的熔点(在标准大气压下),据此判断以下说法中正确的是( )
物质名称
固态水银
金
铜
铁
钨
固态氢
熔点/℃
﹣38.5
1064
1083
1535
3410
﹣259
文学中的化学.
(1)于谦的《石灰吟》中“千锤万凿出深山”描述的是____ 变化(填“物理”或“化学”)
(2)唐代李白诗句“风吹柳花满店香”,主要说明分子____
(3)“釜底抽薪”利用的灭火原理是____ .
(4)“真金不怕火炼”说明金的化学性质____ .
下列关于单项式-35xy2的说法中,正确的是( )
根据短文理解,选择正确答案。
We talked to 300 people. One hundred were from 11 to 18 years old. One hundred were from 19 to 26. One hundred were 27 to 35 years old. We asked them what they like to do on weekends. Please look at the chart.
Favourite things to do (by age).