题目

I feel _______ necessary for her to learn foreign languages because the job she will do is related to foreign business. A. one                            B. it        C. this            D. that 答案：B用化学用语填空：（1）两个氨分子 （2）构成氯化钠的两种微粒 、 ；（3）氯化铁中氯显-1价 ．