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【单选题】
使用不对称密钥算法进行“数字签名”时，公用密钥是公开的，私有密钥是保密的。发送者发送数据时，使用______来加密数据。A.
发送者的私有密钥
B.
发送者的公用密钥
C.
接收者的私有密钥
D.
接收者的公用密钥
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【单选题】—Which of the two T-shirts will you take? —I’ll take . One is for my brother and the other is for myself.
A.
both
B.
either
C.
neither
【单选题】—Which of the two T-shirts will you take? —I’ll take ______, one of my brother, the other for myself. [ ]
A.
either
B.
neither
C.
all
D.
both
【单选题】Of the two T-shirts, I’d choose _________ one to save some money for a book.
A.
the cheapest
B.
the cheaper
C.
more expensive
D.
the most expensive
【判断题】随着社会经济的发展,广播媒体逐渐走向专业化和个性化。广播频率、节目定位更加准确,目标受众进一步细分和明确,企业可以有针对性地选择适合产品目标市场的频率、节目进行广告投放。
A.
正确
B.
错误
【单选题】—Which of the two T-shirts will you take? —I’ll take . One is for my brother and the other is for myself.
A.
either
B.
neither
C.
both
D.
all
【单选题】—Which of the two T-shirts will you take? —I’ll take . One is for my brother and the other is for myself.
A.
either
B.
both
C.
neither
D.
all
【单选题】---Which of the two T-shirts will you take? ---I’ll take ___, one for my father, the other for myself.
A.
either
B.
neither
C.
all
D.
both
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