公共英语三级

单选题 Researchers find it difficult to know how unsafe passwords are due to__________．

A．lack of research tools
B．lack of research funds
C．limited time of studies
D．limited size of samples

参考答案：D进入在线模考
细节题。根据第二段，研究者认为想要测算密码不安全的程度是很困难的，因为许多研究都只能在少量的样本上展开。这说明困难是由于缺少样本造成的，与D项相符，故选D。

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1 It is indicated in the text that__________．

A．Indonesians are sensitive to password security
B．young people tend to have secure passwords
C．nag screens help little in password security
D．passwords for credit cards are usually safe

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2 The underlined word“compromise”in Para．5 most probably means__________．

A．comprise
B．compensate
C．endanger
D．encounter

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3 The last paragraph of the text suggests that__________．

A．net users regulate their online behaviors
B．net users rely on themselves for security
C．big websites limit the number of guesses
D．big websites offer users convenient access

点击查看答案进入在线模考

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