问题：
[单选题]悬挑长度为4m、混泥土强度为C40的现浇阳台板,当混泥土强度至少应达到 ( ) 时方可拆除底摸板。
A、70%
B、100%
C、75%
D、50%
参考答案：
B
相关内容
- ● 学年制是以修满规定的学习时数和学年、考试合格为毕业标准的高校教学管理制度。学分制是一种以学分为计量单位衡量学生完成学业状况的教学管理制度。目前广州大学继续教育学院执行的是（ ）。学生在学期考核中不合格的课程，可以参加补考（即开学补考）。补考一般安排在下学期开学初三周内进行；开学补考不及格或因故未参加开学补考的可参加毕业前补考; 毕业前补考仍不及格，离校前（ ）补考。最后一学期（毕业学期）考核不合格的课程离校前（ ）补考。学分制可以按规定自主选课，学生在学期考核中不合格的课程，不安排补考，再次重修不合格的课程。
- ● CASE OF DEATH OR SERIOUS INJURY TO A PERSON IN AN ACCIDENT OR SHIPPING DISASTER i（）.
- ● Mainly eat 3 or 4 partly cloudy to overcat occaional rain（）lowly outh moderate or good.
- ● （）any cae or upected cae of quarantinable dieae，or any cae of eruptive dieae or any death be dicovered，the local quarantine officer mut be notified immediately．
- ● Should any cae or upected cae of quarantinable dieae，or any cae of eruptive dieae or any death be dicovered，the local Quarantine Officer mut be（）immediately.
- ● 学期课程考核不合格者需补考，成绩单上注明“补考”字样，补考仍不及格者，可参加（）
- ● Mater are（）olely reponible for all damage or accident of whatever kind reulting from the navigating or handling of their veel by day or by night.
- ● If he i a common carrier，he i abolutely reponible to the owner of the good carried （）any lo or damage to them unle caued by an Act of God or the Queen’ enemie，or the inherent vice in the good themelve，or the negligence of the owner of the good，or a general average acrifice.
- ● 系统中雷达状态包括Unknown、Operational（or ON）、Failed（or OFF）、Detached。
- ● Owner are to be reponible for lo of or damage to the good or delay in delivery of the good only in cae the lo，damage or delay ha been caued by the improper or negligent towage of the good．Thi mean that（）.
- ● The carrier i liable for lo of or damage to the good or delay in delivery caued by fire，（）the claimant prove that the fire aroe from fault or neglect on the part of the carrier，hi ervant or agent.
- ● Shutdown price（or point，or rule） 停业价格（或停业点、停业原则）
