1212、营运人应与当地的管理当局协商，调整间隔时间，使其最适合各自的运营坏境。

Operators should negotiate with their local regulatory agency to adjust intervals to a best fit for theirindividual operational environments.

Airlines should consult local authority, the interval shall be adjusted although it best suits their uniqueoperationa1 environment.

In order to get the best intervals for their operational environments, operators should consult with localadministration.

正确答案：A

249、Remove the detergent with a clean cotton wiper that is moist with water.

248、在正文的其余部分,使用了相关的经批准的缩写。

247、然而,制造商可能会省略不适用于该产品的系统/章,或者在可行的情况下合并系统/章。

246、The letters wills be matt black on white.

245、The microprocessor cards are interchangeable.

244、Keep the backup file in a safe area.

243、外径必须与内径同轴。

242、The door is made of carbon fiber reinforced plastic.

241、Before you put new oil in the system, it is mandatory to replace the filter.

240、Long noun clusters are not easy to understand because the words in the noun cluster can connect to each other indifferent way.