新三民主义中,民族主义的最大特点是 [ ]
A.反对满洲贵族统治
B.反对封建统治
C.反对帝国主义压迫
D.反对民族压迫
答案:C
— What can we do to help animals in nature reserves?
— We can .
A.keep hunters away from reserves
B.take their babies home
C.cut down some trees in reserves
D.encourage farmers to grow more rice in reserves
管路系统的特性曲线是随着()的增加而上升。
A、流量
B、扬程
C、轴功率
D、效率