The open declaration of the containment policy was made by President ______on March 12, 1949 in a speech to the joint session of Congress.
A、Cliton
B、Truman
C、Bush
D、Obama
【正确答案】：B
【题目解析】：The open declaration of the containment policy was made by President Truman on March 12, 1949 in a speech to the joint session of Congress.参见教材P215。
