第30题: [单项选择]North Korea reacted to the U.S. suspension of fuel shipment by doing all of the following BUT A. withdrawing from the Nuclear Nonproliferation Treaty. B. taking steps to restart frozen nuclear facilities. C. having a covert nuclear program. D. expelling U.N. monitors. 参考答案:C 答案解析:[题解] 根据新闻,核问题的爆发正是因为朝鲜承认正在秘密进行一项核计划。所以,不是朝鲜对美国做出的报复行为。the North retaliated(报复;回敬)by expelling U.N.mo
第31题: [单项选择]稳定型心绞痛是指心绞痛发作 A. 心电图无改变 B. 疼痛部位改变 C. 心电图ST段抬高 D. 性质在2个月~3个月内无改变 E. 性质在1个月~3个月内无改变 参考答案:E