题目

   35.It is said that dogs will keep you _____ as long as you want when you are feeling lonely. A. accompany  B.company    C. friend  D.safely 答案：B有一瓶久置的Na2SO3试剂，确认其部分被氧化的方法是 A．滴入AgNO3溶液 B．滴入BaCl2溶液 C．滴入少许Ba(OH )2溶液后，再滴入足量稀硝酸 D．滴入少许BaCl2溶液后，再滴入足量稀盐酸