题目

KANDAHAR, Afghanistan–-- Afghans burned tires and chanted “Death to America” after U.S troops fired Monday(April 12, 2010) on a civilian bus near Kandahar, killing four people and wounding more than a dozen. Afghanistan’s president accused NATO of breaking its commitment to safeguard civilian lives. The attack angered Afghan officials and the public in Kandahar, the Taliban’s birthplace, and dealt a blow to U.S and NATO efforts to win popular support for a coming offensive to drive the insurgents(叛乱分子) from the biggest city in the south. NATO expressed regret for the loss of 2002 年，科学家获得了 6 个非常罕见的 Fe-45 原子，这 6 个原子中发生了双质子衰变，即由一个原子核同时放出两个质子的衰变方式，以下有关原子的说法正确的是A. 该原子中子数与质子数之差为 19B. 他们获得了一种新元素C. 与的化学性质几乎完全相同D. 这种铁原子衰变出 2 个质子后变成