《马五哥与尕豆妹》是（）民间叙事诗的代表作品。
A.蒙古族
B.土族
C.回族
D.撒拉族
参考答案：C
---- You haven’t got the textbook for my chemistry course yet.
---- I know, and we _____ to get it for the last 5 weeks.
A．will have been trying
B．have been trying
C．will be trying
D．had tried
干式变压器检查。
