题目

下列说法正确的是（ ） A . 氧气中氧元素的化合价为0 B . 一个二氧化硫分子是由一个硫原子和一个氧分子构成的 C . 原子的质量主要集中在电子上 D . 不带电的粒子只有原子、中子 答案：AAfter the earthquake, the local government took immediate measures to provide _____ for those who had lost their homes.A．accommodationB．occupationC．equipmentD．furniture