题目

Sunday is more like Monday than it used to be. Places of business that used to keep daytime“business hours” are now open late into the night. And on the Internet, the hour of the day and the day of the week have become irrelevant（不相关的）. A half century ago in the United States, most people experienced strong and precise dividing lines between days of rest and days of work, school time and summer time. Today the boundaries still exist, but they seem not clear.     The law in almost all states used to require stores to close on Sunday; in most, it no longer does. It use下列关于经典力学的说法中正确的是（ ）A．经典力学的思想方法只在物理学与天文学产生了影响B．经典力学只适用于宏观、低速、弱引力场C．经典力学只适用于微观、低速、弱引力场D．经典力学只适用于宏观、高速、强引力场