I invited my good friend to come to my party, but she me.
A:agreed
B:disagreed
C:refused
我国唯一注入北冰洋的河流是( )
ⅥA族的氧、硫、硒(Se)、碲(Te)等元素在化合物中常表现出多种氧化态,含ⅥA族元素的化合物在研究和生产中有许多重要用途.请回答下列问题: