在化学反应前后 ①原子的数目；②元素的种类；③分子的数目；④物质的总质量，肯定没
题型：选择题
问题：
在化学反应前后
①原子的数目；②元素的种类；③分子的数目；④物质的总质量，肯定没有发生变化的一组是 [ ]
A．①②③
B．②③④
C．①②④
D．①③④
题型：选择题
首字母填空。
I don't think you understand my life. You think I should study a__1__ the time. I know you want me
to find a good job when I g__2__ up, but I would like to have a w__3__ time, too. You never think
about fun things for me to do l__4__ music, sports or art. Two days ago, when I was watching a football
game on TV, you asked me to s__5__ and to do my homework.. After f__6__ my h
omework, you
didn't let me read football books or m__7__ still. You said I had to go to bed early .You also said I
needed at least 8 hours' s__8__at night. I feel so t__9__ now because I don't have any time to relax
(放松) myself. I r_10__ love you, mum, but I wish you could try not to be so hard on me.
Love,
Jim