A survey of the opinions of the students _______ that two hours of physical exercise a day _______ acceptable in our campus.
A:shows; are
B:shows; is
C:show; is
D:show; are
观察下面两幅图,与唐朝长安城比较,明朝北京城设计的最主要特点是( )
实验序号
过氧化氢溶液浓度/%
过氧化氢溶液体积/mL
温度/℃
二氧化锰的用量/g
收集氧气的体积/mL
反应所需的时间/s
①
5
1
20
0.1
4
16.75
②
15
6.04
③
30
35
\
2
49.21
④
55
10.76
-- How did your class raise money for the poor old man in hospital?
-- We organized a book fair on the playground and sold some books and CDs.
根据以下材料,选取角度,自拟题目,写一篇不少于800字的文章,字体不限,诗歌除外。
俗话说,有话则长,无话则短。有人却说,有话则短,无话则长——别人已说的我不必再说,别人无话可说处我也许有话要说。有时这是个性的彰显,有时则是创新意识的闪现。