雅思阅读材料：美国向海地灾区空投水和食物

　　美国向海地灾区空投水和食物

　　The US military has begun airdropping water and food into earthquake-hit Haiti, after earlier ruling out such a delivery method as too risky.

　　在排除空投危险性后，美国军方已开始向海地地震灾区空投水和食物。

　　Airdrops were earlier ruled out amid fears they might provoke riots

　　Some 14,000 ready-to-eat meals and 15,000 litres of water were dropped in a secure area north-east of Port-au-Prince, a US military spokeswoman said.

　　Military officials are now considering whether airdrops should be used throughout Haiti.

　　More than 2,000 US marines are set to join 1,000 US troops in Haiti.

　　They are equipped with heavy lifting and earth-moving equipment, a dozen helicopters and medical support facilities.

　　Their arrival comes amid widespread violence and looting

　　However, UN humanitarian chief John Holmes played down worries over security, saying that despite incidents of violence, the overall situation was calm.

　　And the leading US general in Haiti, Lt Gen Ken Keen, said there was currently less violence in the capital Port-au-Prince - already a troubled city - than there had been before the earthquake.

　　Earlier, Gen Keen said up to 200,000 people might have died in the disaster, which he said was of "epic proportions".

　　Aid workers are starting to expand their efforts to earthquake-affected areas outside the capital, including Leogane, Gressier, Petit-Goave and the coastal town of Jacmel.

　　Aid effort 'improving'

　　The US Air Force C-17 dropped the relief supplies on Monday into a secured area five miles (8km) north-east of Port-au-Prince, US army spokeswoman Maj Tanya Bradsher was quoted as saying by the Associated Press.

　　She said the aircraft had flown out of Pope Air Force Base in North Carolina.

　　Last week, US Defence Secretary Robert Gates said airdrops had been ruled out because they might do more harm than good.

　　Mr Gates warned that they could trigger riotsif there was no proper structure on the ground to distribute supplies

　　Delivering aid to the centre of Port-au-Prince is getting much more difficult, as anger fuelled by hunger reaches boiling point, and military escorts护卫者 are needed for lorries carrying supplies, the BBC's David Loyn reports from the city.