The astronauts were helped on to a stretcher, which is standard practice after spending so long in the weightless environment.
中游的优势在于规模效应显著，边际成本随业务扩张不断递减，且客户迁移成本高，黏性极强。但行业竞争激烈的同时，也潜藏着两大风险：一是价格战频发，压缩盈利空间；二是高度依赖下游需求持续性，若AI应用商业化进程延迟，算力租赁需求可能出现下滑。
，详情可参考旺商聊官方下载
def close(self) - None:
testSort(selectionSort, "Selection", arr, N);
for (let i = left; i <= right; i++) {