三、四级施工企业每工日人工费标准为一二级施工企业人工费标准的70%。
参考答案：错
The teacher together with the students______ discussing Reading Skills that ________ newly
published in America. [ ]
A. are; were
B. is; were
C. are; was
D. is; was
表达式pow(2.8，sqrt(float(x)))值的数据类型为______型。
