为坐标原点,直线
交圆
于
,
两点,则
面积的最大值是( )
中间 间隔 田间 间接
操场 场院 一场雨 广场
步骤一:取4个罐头瓶编号1-4号,每一瓶底放6层餐巾纸,每一瓶中放3粒菜豆种子于餐巾纸上。
步骤二:将1-4号瓶做了如下不同的处理,5天后取出观察到如下实验现象。
|
编号 |
处理方法 |
实验现象 |
||
|
1 |
不做处理 |
盖上瓶盖 |
放入25℃的培养箱中 |
不萌发 |
|
2 |
不做处理 |
盖上瓶盖 |
放入5℃的培养箱中 |
不萌发 |
|
3 |
向瓶中加水至餐巾纸湿润 |
盖上瓶盖 |
放入5℃的培养箱中 |
不萌发 |
|
4 |
向瓶中加水至餐巾纸湿润 |
盖上瓶盖 |
放入25℃的培养箱中 |
萌发 |
请你根据步骤和实验现象,回答下列问题:
Yesterday, I was walking down the street I saw four separate dimes (角) on the ground shining in the sunlight. I bent down, picked them up and entered the post office. Inside a lady (dig) through her purse at the counter anxiously looking for change to mail a package. Believe it or not, she was exactly forty cents short. How amazing it was! I placed my dimes on the counter. The smile I got in return was worth a thousand (dollar).

①丧失使用价值的商品,必定不能实现其价值
②丧失价值的商品,必定会丧失其使用价值
③商品是价值与使用价值的统一体
④使用价值与价值相互依存、不可分割
满足
,则
( )
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