从如图漫画中,你看到了( )
①“看客”心态 ②见义勇为
③对社会的冷漠情绪 ④合作与竞争
A:①②④
B:①③④
C:①②③
D:②③④
My grandfather began to use the computer in his ____(六十多岁).
- Do you think our basketball team will win the match?
- Yes, we have better players. So I them to win.
用实验证明Mg、Fe、Cu三种金属的活动性顺序,可选择
如图,一个重力为G木块从斜面上滑下,