0.8×0.34×1.25=0.8×1.25×0.34 这是根据[ ]
A．乘法分配律
B．加法交换律
C．乘法结合律
D．乘法交换律
答案：D
The coal miners in the coal mine for 10 hours before we came to their rescue.
A．had trapped
B．had been trapping
C．had been trapped
D．would have been trapped
关于德国鲁尔区工业区位条件的错误叙述是 [ ]
A、丰富的铁矿资源
B、丰富的煤炭资源
C、充足的水源
D、便捷的水陆交通
