题目内容
IC cards contain (v. 包含) a dime-sized _______ that can process and store thousands of bits of electronic data.
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They are now under a great deal of pressure to tighten (v. 变紧) their airport _______.
Artificial intelligence is technology designed to ______ jobs that require higher-level thinking skills.
China's air force has grown stronger in combat capability (战斗能力)and will enhance its _______presence in both the high seas and the air.
People in different countries behave in different ways because they have different ____background.
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