It's difficult for the village children to cross the river to get to school. We think a bridge________ over the river
A:was built
B:should be built
C:has been built
D:is being built
为了解一片速生林的生长情况,随机测量了其中100株树木的底部周长(单位:cm).根据所得数据画出样本的频率分布直方图(如图),那么在这100株树木中,底部周长大于110cm的株数是( )
右边的苹果比左边多____个。