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The high-speed trains can have a major impact on our lives.
A:effort
B:problem
C:influence
D:concern
B:problem
C:influence
D:concern
参考答案
参考解析
解析：题干意思为：高速铁路能够给我们的生活带来深远影响。impact：影响。 effort：努力，尽力；problem：问题，疑难ii题；influence：影响；concern：担心，焦虑。经过分析，只有选项C与题干意思相符。
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tolerantB
uncertainC
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doubtful
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单选题How can I convince you of that we have almost used up our supplies?A
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