A:若 ma=mb,则 ca>cb
B:若 ma>mb,则 ca=cb
C:若 ca>cb,则 ma<mb
D:若 ca<cb,则 ma>mb
下列选项中与 “《共产党宣言》”无关的陈述是( )
能使反应Cu+2H2O=Cu(OH)2↓+H2↑发生且Cu(OH)2能在电极上析出的是( )
桃花鱼属于____动物,它与涡虫都有的共同特征是没有____.
the first lesson, the teacher put an egg on the table and asked him to draw it.