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【单选题】
为了保障数据的存储和传输安全，需要对一些重要数据进行加密。由于对称密码算法(42)，所以特别适合对大量的数据进行加密。A.
比非对称密码算法更安全
B.
比非对称密码算法密钥长度更长
C.
比非对称密码算法效率更高
D.
还能同时用于身份认证
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反馈参考答案：
举一反三
【单选题】Questions 19 and 21 will be based on the following news item.---19
A.
March 20 through April 2.
B.
March 21 through April 1.
C.
March 25 through April 1.
D.
March 26 through April 2.
【简答题】Questions 19 to 21 are based on the conversation you have just heard. 第19题： A) To interview a few job applicants. B) To fill a vacancy in the company. C) To advertise for a junior sales manager. D) To...
【单选题】Questions 19 to 21 are based on the conversation you have just heard.19.
A.
Because he wants to improve his skating techniques.
B.
Because he wants to relax.
C.
Because he wants to take a course.
D.
Because he wants to learn to ski.
【简答题】你应该9点到达(get to)学校。
【简答题】疾病发生的原因包括()、()、()、( )、()、()和()。
【单选题】Questions 19 to 21 are based on the conversation you have just heard,
A.
Conducting a training session for security guards.
B.
Interviewing a person for a job.
C.
Giving a sales talk on alarm systems.
D.
Asking a coworker some questions.
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