生产矿井必须安装2套同等能力的主要通风机装置，其中1套作为备用。
参考答案：对
丰子恺《漫画的描法》中提到：“（）”。
Which of the following statements is NOT true according to the speaker().
A.Managing Director is accountable to the Board.
B.Management Services Department is led by Mr. Bruce.
C.Regional Managers are responsible for the day-to-day management of their territory.
D.Each of the five regions is supported by two sections -- Marketing and Technical Services.
