新华社美国尤金7月25日电（记者王子江）世界田联25日宣布，巴黎奥运会200米到1500米之间所有距离的个人单项比赛，将增加一轮比赛，称之为“复活赛”。世界田联在发布的声明中说，预赛中没有按照小组名次直接晋级半决赛的选手，将通过“复活赛”争夺晋级名额，而不是按照现在的方式——以最快的成绩排名决定剩余的晋级名额。    A "super fog" in Louisiana has caused a multi-car pileup on Interstate 55 near New Orleans, Louisiana, after severely lowering visibility, according to police.The crash, involving dozens of cars, occurred on Monday morning due to heavy fog conditions, according to Louisiana State Police. A long stretch of Interstate 55, a 24-mile-long highway over Lake Pontchartrain near New Orleans, is expected to be closed "for the foreseeable future," police said.Interstate 10 and Interstate 310 were also closed as a result of the crash, police said. Louisiana Gov. John Bel Edwards confirmed the accident in a statement Monday that there were fatalities in the crash, but did not say how many people were killed or injured.For hours after the crash, emergency crews worked to clear debris from both northbound and southbound lanes, according to state police.The super fog was caused by smoke from marsh fires burning in the region combined with dense fog developing in the area early Monday morning bringing extremely low visibility. In some spots, visibility was near zero, creating dangerous driving conditions.Super fogs typically form when condensed water vapor mixes with the smoke and moisture released from damp organic material smoldering from a nearby fire, such as brush, leaves and trees, according to the National Weather Service. Visibility can be lowered to less than 10 feet as a result, according to the NWS.This has been occurring in the region over the past several mornings, with the location of the densest fog and most dangerous conditions varying day to day, forecasts show.Super fogs can be especially dangerous when they develop near and over highways. The localized nature of the weather phenomenon means that visibility conditions can worsen rapidly within a very short distance, which can lead to a hazardous combination of sudden low to near-zero visibility and vehicles traveling at a high speed on a highway.The very limited visibility then hinders a driver's ability to react to changing conditions on a roadway.The National Weather Service issued a dense fog advisory for much of southeastern Louisiana on Monday morning, including from Baton Rouge to New Orleans.Over the past several days, the National Weather Service has been warning of the threat of dense fog during the early mornings in the region that would be worsened in some areas by nearby marsh fires. State police advised drivers to use their low-beam headlights if they can't see at least 500 feet in front of them.The fog dissipated by mid Monday morning, and all fog alerts have since been canceled.While areas of smoke will continue to be possible in the area as various marsh fires continue to burn, fog is not forecast to be a major issue Monday night, as weather conditions will be less favorable for fog development.Morning fog is not uncommon this time of the year for the region, but more than 86% of the state is currently battling extreme drought conditions, which is elevating fire danger. This could mean more instances of super fog in the coming days and weeks as cooler temperatures settle in, but the drought and wildfire risk persist.In addition, devastating drought and wildfire conditions continue to impact Louisiana. More than 60% of the state is now categorized at exceptional drought, the highest category of concern, according to the U.S. Drought Monitor. Just three months ago, 0% of the state was listed under exceptional drought."The combination of wildfire smoke and dense fog is dangerous, and I want to encourage all Louisianans in affected areas to take extreme caution when traveling," Edwards said in a statement.State troopers are working to notify families and investigate the exact cause of the crash, according to state police.It is unclear how many fatalities and injuries occurred as a result of the crash. The St. John the Baptist Parish Sheriff's Office directed media requests to Louisiana State Police.Additional information was not immediately available. Louisiana State Police did not immediately reply to ABC News' request for comment.。按照现在的做法，以小组名次直接晋级的选手在成绩表上以大写的Q标注出线，剩下的通过成绩排名晋级的选手以小写的q表示，以后小写的q将不再出现。在刚刚结束的世锦赛男子百米比赛预赛中，苏炳添在第二组中跑出10秒15，排名小组第五。根据规则，预赛每个小组前三名直接晋级，其他选手按照成绩排名，前三位可递补晋级。最终苏炳添在非直接晋级选手中排名第三，获得了半决赛资格。女子百米选手葛曼棋也是通过这种方式，进入了半决赛。世界田联透露，新的规则适用于200米、400米、800米和1500米、女子100米栏、男子110米栏和400米栏，之前这些项目赛制为预赛、半决赛和决赛，新赛制在预赛后加入“复活赛”就变为四轮比赛，可以保证每名运动员至少可以在参赛过程中跑两枪。

B | 新规则将不适用于男女100米比赛，因为百米比赛已经在预赛前就有一轮预选赛，原本就有四轮比赛。

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