在平面直角坐标系中，矩形OABC的顶点O在标原点，顶点A、B分别在x轴、y轴的正半轴上，OA=6，OB=8，D为边OB的中点．

以下关于中国古代文化的表述，正确的是(     )

应用乘法运律定律，在横线上填上适当的数．

125×77×8=77×(____×____)

任务型阅读Sunshine Clothes Store
     Hi, boys and girls! Please come to our store. We have white and blue socks for $3.The black hat is only $4.The T-shirt is on sale for only $6.We have red T-shirts, white T-shirts and black T-shirts. The white sweater is $8, the red sweater is $9 and the blue sweater is $10.We also have black trousers and blue trousers. They are $11.The shorts are $14, and the shoes are $14, too.

关于转运RNA和氨基酸之间相互关系的说法，正确的是