某工程10月份拟完工程计划施工成本50万元，已完工程计划施工成本45万元，己完工程实际施工成本48万元，该工程10月底施工成本偏差和进度偏差分别是()。
A. 成本超支3万元，进度拖延5万元
B. 成本超支3万元，进度拖延3万元
C. 成本节约2万元，进度提前5万元
D. 成本节约2万元，进度提前3万元
What did the bus hostess mean by asking, "Could you do that on a plane7"
Air travel does not offer enough services.
B. Ground travel can offer as many services as air travel.
C. Ground travel can sometimes offer more services than air travel.
D. Air travel offers more and better services than ground travel.
微信支付 
支付宝支付