钢丝网的各元素成分中C、的含量要求正确的是()。
A、≤0.10
B、≤0.15
C、≤0.12
D、≤0.13
参考答案:B
In relation to company law:
(a) state, and explain the purpose of, the various registers that have to be kept by a company. (4 marks)
路面水泥混凝土与结构混凝土相比,在配合比设计过程中还应对混凝土的______提出要求。
A.强度 B.和易性 C.耐久性 D.耐磨性