如果一个长方体的所有棱长都相等,那么这个长方体□正方体。□内应填[ ]
A.一定是
B.有可能是
C.有可能还是
D.不是
答案:A
对生活中的下列现象,解释不合理的是( )
A.25m3的石油气在加压的情况下可装入容积为0.024m3的钢瓶中--分子间有间隔
B.月季花汁能区分食醋和石灰水--月季花汁遇酸碱会呈现不同的颜色
C.古代书法(用碳黑等制成的墨书写)保存至今不变色--常温下碳的化学性质稳定
D.沙漠地区的铁制品锈蚀较慢--沙漠地区缺少氧气
Directions:
Write an essay of 160--200 words based on the following picture. In your essay, you should
1) describe the picture briefly,
2) show your understanding of its symbolic meaning, and
3) give your view on the Olympics. You should write it neatly on ANSWER SHEET 2.