我国海军拥有众多水面舰艇，其中舷号为525、526的舰艇属于（）
A、登陆舰
B、驱逐舰
C、护卫舰
D、补给舰
参考答案：C
Nobody believed his reason for being absent form the class _____ he had to meet his uncle at the air port. [ ]
A. why
B. that
C. where
D. because
机车长期备用指备用（）以上的机车。
A、半个月
B、一个月
C、十天
D、二十天
