砂泵的扬程、流量与矿浆的比重、浓度并无关系。
参考答案:错
Thousands of people after the powerful earthquake happened in Japan on March 11th.
A saved B was saved C were saved D has saved
以下各项中,属于营业外支出的项目是()。
A.固定资产盘亏净损失
B.大修理费用
C.对外投资损失
D.广告费用