针对美国的“冷战”政策,苏联和东欧国家采取的重大举措有
①组织经济互助委员会②组织华约③接受马歇尔计划④在古巴建立导弹基地[ ]
A.①②
B.①③
C.①②④
D.①③④
答案:A
—What did he say his stupid behavior?
—He admitted having made a serious mistake.
A.in explanation of
B.in favor of
C.in case of
D.in fear of
简述“闭关锁国”的含义。