试题题干
The open declaration of the containment policy toward the Soviet Union was made by （ ） on March 12, 1949 in a speech to the joint session of congress.
参考答案
正确答案：
试题解析
1949年3月12日，杜鲁门在国会联席会议上发表了对苏联遏制政策的公开宣言。
The open declaration of the containment policy toward the Soviet Union was made by （ ） on March 12, 1949 in a speech to the joint session of congress.
1949年3月12日，杜鲁门在国会联席会议上发表了对苏联遏制政策的公开宣言。