The Soviet troops were surprised by Hitler' s invasion because they thought they were the strongest power at that time.
举一反三
- Hitler began an invasion of the Soviet Union that was the largest military land campaign in history. （ ）
- When did Hitler begin an invasion of the Soviet Union without a declaration of war?
- Einstein thought that his ideas were accepted because ________.
- The gains of free time were unevenly distributed only because different groups of people gained different amount of free time.
- The Vikings were equal to pirate at that time not because ______.