柴油发电机的额定功率、额定电流、额定电压?
参考答案:
580kW、929A、380V。
It puzzles the scientists _____ some mammals produce their young _____ others lay eggs.
A.that; while
B.what; while
C.that; as
D.what; as
流域面积是指河流某断面以上()
A、地面分水线和地下分水线包围的面积之和
B、地下分水线包围的水平投影面积
C、地面分水线所包围的面积
D、地面分水线所包围的水平投影面积