预裂爆破是首先起爆（），在开挖断面内其他炮眼爆破之前，先沿开挖轮廓线预裂爆出一条裂缝。
A、掏槽眼
B、辅助眼
C、周边眼
D、底板眼
参考答案：C
To get a good view of the scenery in China, Lucy would spend a lot of time on the train _________ travel by air.
A．rather than
B．other than
C．more than
D．instead of
古罗马亲属法中依市民法的规定而成立的婚姻，结婚方式分为（）.
A.共食婚
B.宗教婚
C.买卖婚
D.时效婚
