采用矿用防爆柴油机动力装置时，油箱的最大容量不得超过（）小时的用油量。
A、6
B、12
C、8
D、15
参考答案：C
The beautiful mountain village _____ we spent our holiday last year is located in _____ is now
part of Guangxi.[ ]
A. which; where
B. where; what
C. that; what
D. when; which
证券经纪人从事代理证券买卖活动不需要承担价格风险，所以代理证券买卖的经纪业务是一种无风险的业务。( )
