单项选择题

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请列举两个国内出口跨境B2B电商的信息服务平台(1)

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多项选择题

围岩应力重分布是洞室开挖过程原有天然应力大小、方向和性质发生改变的过程和现象，其主要影响因素有（）
Surrounding rock stress redistribution is the process and phenomenon in which the original natural stress magnitude, direction and nature change during the process of cave excavation. What are the main influencing factors?

A．地下水状况 Groundwater condition
B．岩体初始应力状态 Initial stress state of rock mass
C．洞室断面形状 Cave Section shape
D．开挖方式 Excavation method