More than two trees are planted in our neighbor-hood every year.
A:hundred
B:hundreds
C:hundreds of
D:hundred of
计算
80×1.25×4.3-4.3=____
“预则立,不预则废”这句话告诉我们( )
在某容积一定的密闭容器中,可逆反应:A(g)+B(g)⇌XC(g);△H<0符合图象(Ⅰ)所示关系,由此推断对图象(Ⅱ)的正确说法是( )