客专隧道底部超挖部分应用与隧底结构同级混凝土回填。其余部位的超挖、坍塌,可采用混凝土、片石混凝土回填。所有超挖部分不得用()回填。
参考答案:浆砌片石
Fair and(1)competition in government procurement around the world is good business and good public policy. Competitive pricing, product (2)and performance improvements result from competitive practices and help ensure that government authorities get the best (3)for the public they serve.
A. help
B. server
C. value
D. policy
“操纵能力受到限制的船舶”一词应包括()。
A、从事疏浚、测量或水下作业的船舶
B、从事清除水雷作业的船舶
C、从事拖带作业的船舶,而该项拖带作业使该拖船及其被拖物体驶离其航向的能力严重受到限制者
D、在航中从事补给或转运人员、食品或货物的船舶