《公路工程施工监理规范》5.1.11规定,监理工程师对已完工程实体质量的抽检频率应不低于施工单位自检频率的()
A.10%
B.20%
C.30%
D.40%
参考答案:B
心胸比值大于多少应视为高危病人()
A.0.5
B.0.55
C.0.6
D.0.65
E.0.7
The ______Approach believes that mistakes are unavoidable in the creative use of language, and students’ mistakes are a necessary and natural______.