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【段2】①Americans are willing to tolerate time-consuming security procedures in return for increased safety. ②The crash of EgyptAir Flight 804, which terrorists may have downed over the Mediterranean Sea, provides another tragic reminder of why. ③But demanding too much of air travelers or providing too little security in return undermines public support for the process. ④And it should: Wasted time is a drag on Americans’ economic and private lives, not to mention infuriating.
21.The crash of EgyptAir Flight 804 is mentioned to
[A]stress the urgency to strengthen security worldwide.
[B]explain Americans’ tolerance of current security checks.
[C]highlight the necessity of upgrading major U.S. airports.
[D]emphasize the importance of privacy protection.
答案：B
问：21题题干中的例子所服务的观点在原文哪句话中？
A : 段2句②
B : 段2句④
C : 段2句①
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