判断钢材是否合格的依据是()
A、质量好坏
B、标准
C、加工性能
参考答案:B
Sam has been appointed ____ manager of engineering department to take ____place of Tim.
A./; /
B.the; /
C.the; the
D./; the
绿洲效应包括大气湿度较大、气温变化幅度较大、土壤湿度较大等特点。