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BaiDuInterview.prototype.technicalInterview= function () {Focal length, also known as MF. It refers to manual focusing. When taking photos, you need to click on the screen to determine the focus.肯定管饱，不会饿着你的。The Second World War was the war with the largest number of casualties in history, with a total of 55-60 million dead and 130 million injured, totaling 190 million dead and injured. The following are the casualties in major countries:The number is small and unusual. In front of the tens of billions of express deliveries each year, the more than 10 million green express packages put in are really a drop in the bucket. However, for express delivery companies, the cost of large-scale promotion is beyond their affordability. Niu Zhijing, head of Cainiao Green Action, said: "Can consumers be willing to bear a little of these costs, can our businesses be willing to bear a little, and can our government encourage some?" Yang Daqing, a special researcher of the China Logistics Association, said: "If we achieve a unified standard through the whole chain, we will reduce the cost pressure brought by a single enterprise in a single link."