题目

N5+是一种具有爆炸性的高能材料，已知一个氮原子核内有7个质子。关于N5+的说法正确的是( ) A . 该微粒中的质子数为 34 B . 每个该微粒带一个单位正电荷 C . 该微粒由5个氮分子构成 D . 它是一种由5个氮原子构成的单质分子 答案：B Living near the sea, ________． [　　] A． so we enjoy healthy air and beautiful sight． B． healthy air and beautiful sight is what we enjoy． C． we enjoy healthy air and beautiful sight． D． it is healthy air and beautiful sight is what we enjoy．