【新加坡联合早报 3月 2 1日报道】　美中核能合作协议已于 3月 19日正式生效 ,它为美国向中国出售价值几十亿美元的核能设备的交易清除了障碍。1月 12日 ,美国总统克林顿书面向国会证明中国已不扩散核武器 ,如果国会不同意克林顿提出的书面证明 ,它必须在 30天立法期限内提出 [Lianhe Zaobao, Singapore, March 21 reported that the US-China agreement on nuclear energy came into force on March 19, clearing the way for the U.S. to sell billions of dollars worth of nuclear equipment to China. On January 12, U.S. President Bill Clinton confirmed in writing to the Diet that China has not proliferated its nuclear weapons. If Congress did not agree with the written evidence submitted by Clinton, it must submit it within the 30-day legislative deadline