下列关于黄土高原成因的学说,得到广泛支持的是()
A.水成说
B.风成说
C.风水相说
D.风水雨相说
参考答案:B
________ achievement, last week’s ministerial meeting of the WTO here earned a low, though not failing, grade.
A.In terms of
B.in case of
C.As a result of
D.in face of
机泵检修前必须停电、关闭进出口阀、排空泵内介质,确认具备检修条件后联系施工单位处理。