A:与钠反应放出氢气
B:与碳酸氢钠反应
C:能与溴水发生取代反应
D:发生相互加成反应生成高分子化合物
我国面积最大的淡水湖是( )
按所给儿歌的形式,自编儿歌,并且念一念。
A ruler, a rubber,
I can see.
A. ruler, a rubber,
for you and me.
(提示:可将ruler,rubber改为book,pencil等)
如果α是锐角,且sinα= 35 ,那么cos(90°-α)的值为( )
The reason why her novels enjoy great popularity among readers is that all the stories are a____ in everyday experience.