问题 解答题

做一个底面直径是40cm,高是30cm的圆柱形无盖铁皮水桶,至少需要多少铁皮?

答案

3.14×(40÷2)2+3.14×40×30,

=1256+3768,

=5024(平方厘米);

答:做这个水桶至少需要5024平方厘米的铁皮.

阅读理解与欣赏

       爸爸搂着孩子,望着窗外闪过去的白杨树,又陷入沉思。突然,他的嘴角又浮起一丝微笑,那是 因为他看见火车前进方向的右面,在一棵高大的白杨树身边,几棵小树正迎着风沙成长起来。     

1.这是爸爸第几次沉思?他沉思什么?

                                                                                                                                        

2.课文中把白杨树比喻成什么?“一棵高大的白杨树”暗指谁?“几棵小树”又暗指谁?

                                                                                                                                         

3.为什么“他的嘴角又浮起一丝微笑?

                                                                                                                                           

4.这段话主要写了什么内容?

                                                                                                                                           

不定项选择