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Manual Focus (MF): Manually adjust the focusing mode, similar to the lens contraction and extension of SLR, so that the focus can be completely controlled by yourself.在一项大工程的招标中，意欲中标的农民建筑公司经理任北杭遭到主管朱科长的和女工程师宋锐的阻挠。任北杭急中生智保住了工程。工程开工后，就施工问题，宋工程师与任北杭发生多次争执。接着，工程急需的钢材供应上又出了问题。任北杭以邪治邪，设了一席丰盛的“鸿门宴”，使材料科长批了钢材。然而，祸不单行，工程所需的大笔款项银根紧缩，贷款停止。拿不到工资的民工哄抢了任北杭家。在绝望中，亏得宋锐帮助，工程队又绝处逢生。Public class Example-Packets: Packets refer to 64-byte data packets, which is the minimum value of data frames transmitted on Ethernet. Under the same traffic, the smaller the data packets, the more packets there will be. Since network equipment must check and verify the data packets when receiving them, this method can effectively increase the working pressure of network equipment.可是现在，您动手并不合适，项羽再三叮嘱您动手，显然是不安好心。巧合的是地点还是在赵国，想当年祖父王翦首先攻克邯郸，灭亡的第一个国家便是赵。