水工混凝土应具备哪些技术要求?
参考答案:
强度、抗渗性、抗冻性、抗侵蚀性、抗冲刷性、低热性、干缩性
对会计电算化档案管理要做到防磁、防火、防潮和防尘工作,所有会计档案应准备双份,存放在两个不同的地点,最好在两个不同建筑物内。( )
For users, microkernel technology promises (11) , compact and sophisticated operating systems that are typically (12) across a range of hardware platforms.
A.quickly
B.speed
C.slow
D.fast