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南开大学 13春学期《工程施工》在线作业(国外英文资料)
南开大学 13春学期《工程施工》在线作业(国外英文资料)
13 spring semester project construction online homework
1. known P work has a tight work after G, G the latest finish time is fourteenth days and the duration of 3 days, the total float for the first P 2 days for sixth days, the duration is l days, P work for free float (days)
A. 1
B. 2
C. 3
D. 4
The correct answer: B Full Score: 2 points: 2
2. in the network planning, the total time of H work for 3 days, a total of three H J, K, tight L, J the earliest start time and latest start time is twenty-first days and twenty-second days, the earliest completion time of job K and latest finish time was twenty-third and twenty-fifth days L the earliest start time and latest start time were twenty-first days and twenty-third days, is the work of H (day) for free float
A. 1
B. 2
C. 3
D. 4
The correct answer: B Full Score: 2 points: 2
3. for the network of double code time scales drawn by the computation period, the following statement is incorrect
A. in addition to the network starting point, each nodes timescale is the earliest completion time of a job
B. in addition to the network endpoint, each nodes timescale is the earliest start time of a job
C. the total time difference is not zero, and the horizontal projection length of the arrow on the time axis is not equal to the duration of the work
D. wave arrow points at the node not just an arrow node
The correct answer: C Full Score: 2 points: 2
4. the strength of the lower member concrete and the strength of the lower member concrete shall be reduced to the design strength by means of the precast precast concrete pile
A. 20%
B. 30%
C. 40%
D. 50%
The correct answer: B Full Score: 2 points: 2
5. the construction of pre tensioned prestressed concrete. When the prestressed steel bar is relaxed, the strength of concrete should not be less than the design intensity grade
A. 75%
B. 80%
C. 85%
D. 100%
The correct answer: A Full Score: 2 points: 2
6. when the formwork and the support of the cast-in-place fl
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