A:14
B:16
C:38
D:56
如图所示是一个电能表,对其中的重要参数,下列说法错误的是( )
In western countries, when your friend offers (提供 )you something, you can accept it directly(直接地), or refuse it politely. Therefore, which situation fits the western custom?
①外界溶液浓度小于细胞液浓度 ②细胞液浓度小于外界溶液浓度
③细胞壁的伸缩性大于原生质层的伸缩性 ④原生质层的伸缩性大于细胞壁的伸缩性