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【多选题】
桥梁混凝土工程雨期施工的技术要点有( )。A.
在降雨集中的季节施工混凝土工程，必须随时搜集天气预报资料，指导工程施工的安排，以尽量避免风雨对水泥和钢筋等原材料的危害和用电的危害；做好防潮、防漏、排水和防洪工作，做好抢险措施准备；雨期混凝土工作面不宜过大，分期施工
B.
有洪水危害的工程应停止施工；加强地基不良地段的沉降观测，发现问题及时处理；基坑挖好后及时浇筑混凝土或垫层，防止被水浸泡
C.
基坑上边线要设挡，防止地面水流入基坑。基坑应设集水井，配足抽水泵，坡道有截水措施。施工前检查和疏通现场排水系统
D.
雨后及时清除模板和钢筋上的污物。雷区应有防雷措施，台风区要有防风措施；露天设备要有防漏电措施。注意因降雨、受水浸引起砂、石材料含水量增大问题，保持准确的混凝土配合比
E.
做好设施和材料的防雪、防冻措施
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【判断题】The strength of the gravity is determined by the volume of the object, the greater the volume, the stronger the gravity.
A.
正确
B.
错误
【简答题】He decided that the strength of the force keeping a planet in orbit around the sun depended on two things. One was ______ .The other was ______.
【判断题】4) The strength of the gravity is determined by the volume of the object, the greater the volume, the stronger the gravity.
A.
正确
B.
错误
【单选题】The strength of the component means（ ）。
A.
The ability of materials to resist tension, compression, bending, torsion and shear
B.
The ability of components to maintain their original equilibrium state under external forces
C.
The ability of components to to resist deformation under external forces
D.
The ability of members to resist failure under external forces
【单选题】Which of the following statements is correct ? (1) The strength of the parts indicates the ability of that to resist damage. (2) The stiffness of the parts indicates the ability of that to resist defo...
A.
(1), (2), (3)
B.
(4)
C.
all correct
D.
all errors
【单选题】The kite is limited by the following conditions EXCEPT for______.
A.
the strength of the wind
B.
air traffic conditions
C.
the power requirements of the equipment
D.
the movability of the TRAM
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