植物中(尤其谷类、豆类)的P主要以植酸形式存在。
参考答案:对
植树活动中,小华种了a棵树苗,有b棵没有成活,这批树苗的成活率是______%.
All the bees had been at nearby feeding place were doing the circling dance.
A.which
B.what
C.that
D.how