程序printf("%3d",1234);的输出结果是()。
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People,animals and plants will die when_______.
A. the temperature is too high
B. there are too many greenhouse gases
Global warming happens when ________.
A. temperature rises or the Earth heats up
B. there are too many greenhouse gases in the atmosphere
Match the words and phrases with their definitionsaccording to Reading 1.
( )是为防备和抵抗侵略,制止武装颠覆,保卫国家的主权、统一、领土完整和安全,而进行的军事及与军事有关的政治、经济、外交、科技、文化等方面的活动。
A. 国家
B. 军队
C. 武装集团
D. 国防