- Bob, can you read the number 2,357,018?

- Yes, I can. It's_______.

A．two million, three hundred and fifty-seven thousand, and eighteen

B．two million, three hundreds and fifty seven thousand, and eighteen

C．two million, three hundred and fifty-seven thousands, eighteen

D．two millions, three hundred and fifty-seven thousands, eighteen

卷扬机就位时，机架下面要铺设（），并要保持纵、横两个方向的水平。

A．钢梁

B．方木

C．砖块

D．混凝土块