开挖过程中如发现滑坡迹象(如裂缝、滑动等)时,应暂停施工,必要时,所有人员和机械要撤至安全地点。
参考答案:对
What __ public is concerned about is whether the scientists win be able to find _____ cram for the disease.
A.the; a
B.the; /
C./; a
D./; the
从供应商和制造商的角度分析配送中心的作用