纸的第六版Red alert on food这篇文章中第二段有这样一句 "Scientists have found if used in food, ..."其中if是否应为it？ 希望您能够在百忙中给予解答，非常感谢！libo77libo77Libo77, 你好！这是一个省略句，完整句应为"Scientists have found that if it is used in food ……

and lots of others.In a map of China on the homepage, red marks the *chronically worsening food safety crisis. The majority of the country is on red alert. A sidebar carries buzzwords from food safety ……

高温红色预警高温红色预警On Aug 17, the National Meteorological Center (NMC, 国家气象中心) renewed a red alert... and blue.On Aug 17, the National Meteorological Center (NMC, 国家气象中心) renewed a red alert for high ……

raised its terrorism alert from "yellow" to "orange," indicating heightened concern about the possibility... the level of danger. The US terror alert system was borrowed from a different area where it's been ……

to the smog (雾霾).It’s one of the decisions the government made during the days under the red alert (红色..., Beijing sent out its first red alert ever. During the next few weeks, blue, yellow and orange alerts ……

IF you want to win a football game, put your goalkeeper in a red shirt. New research finds that strikers are twice as likely to miss the net if the goalkeeper is in red.The color that links ……

, the amount of caffeine should be printed on food labels to alert consumers. Taylor says the government... chocolate. But now food makers are adding the stimulant (兴奋剂) to many products, from popcorn and potato ……

积停电: blackout红色警报: red alert围困: strandDownturnHow to describe a falling stock market:slump 暴跌Hong Kong's Hang... began. 游行之前，一大群学生乱哄哄的挤在街上。ration: 定量配给The mother has to ration the food for family members ……

. “The WMO community is sounding the Red Alert to the world.”Close to the brink: World Meteorological... Agreement on climate change,” Saulo said. “The WMO community is sounding the Red Alert to the world.” ……

:red alert:(空袭)紧急警报Red Cross:红十字(会)red light:危险信号red-light district:红灯区red meat:牛肉;羊肉red rag:激怒人的事物on red alert:准备遭受危险;应急状态red ball:快车red tape:官样文章;繁琐和拖拉的公事程序see the red light:觉察危险 逼近在经济领域中，红色还指"负债"或"亏损 ……

) its first red alert (红色警报) for heavy air pollution. And during the next few weeks, blue, yellow... in 2013 to measure the air pollution. During the days under the red alert, the PM 2.5 level (含量 ……

SEVERE weather warnings in future will come with a colour-coded alert system, currently being developed by China's National Meteorology Centre (NWC).The system resembles the terrorist alert system ……

a red alert (警告) – the highest warning level – is issued, schools will be suspended and drivers... levels: blue, yellow, orange and red alerts.Blue alert indicates (表示) one upcoming (即将到来的) day ……

For the first time in May, the Beijing Municipal Warning Center upgraded its temperature warning to red, putting power suppliers and fire departments on alert, and causing outdoor work and activities ……

to make us feel hungry. So, it comes naturally for fast food chains to go for red logos – it’s the perfect way to attract hungry customers who want food, fast.“Having a red logo isn’t just a welcoming ……