【多选题】下列关于内照射特点说法正确的是()。
E.
同一数量的放射性物质进入人体后引起的危害,大于其在体外作为外照射源时所造成的危害
【单选题】In many cultures people who were thought to have the ability to ______ dreams were likely to be highly respected.
【简答题】下列说法正确的是 A.PCl 5 中所有的原子都满足最外层8电子结构 B.同素异形体之间的转化属于物理变化 C.质子数相等,电子数也相等的良种微粒可能是不同的离子 D.CaF 2 和Na 2 O 2 的化学键和晶体类型均相同
【单选题】In many cultures people who were thought to have the ability to ______ dreams were likely to be highly respected.