在中华人民共和国飞行情报区内飞行，航空器必须按照批准的航路、机场飞行。

A、AllaircraftflyingwithintheFIAsofthePeople'sRepublicofChinaarerequiredtooperatealongtheapprovedairwaysandatthedesignatedairports.

B、AllaircraftflyingwiththeFIAsofthePeople'sRepublicofChinarequiredtooperatealongtheapprovedairwaysandatthedesignatedairports.

C、AllaircraftflyingwiththeFIRsofthePeople'sRepublicofChinarequiredtooperatealongtheapprovedairwaysandatthedesignatedairports.

D、AllaircraftflyingwithintheFIRsofthePeople'sRepublicofChinaarerequiredtooperatealongtheapprovedairwaysandatthedesignatedairports.

正确答案：D