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【单选题】
关于散列函数的说法不正确的是( )A.
下载软件的用户可以利用散列值验证软件的正确性
B.
散列函数是绝对安全的
C.
用户可以利用散列值检查文件是否染毒
D.
一般数字签名用私钥对数据的散列值进行计算
拍照语音搜题，微信中搜索"皮皮学"使用
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皮皮学刷刷变学霸
举一反三
【单选题】My father has often________me________when I've been a bit short of money. [ ]
A.
sent; out
B.
driven; off
C.
helped; out
D.
pulled; in
【单选题】Preoccupation with the body has become a societal mania: We've become a nation of appearance junkies and fitness zealots.
A.
ecstasy
B.
fashion
C.
insanity
D.
enthusiasm
【单选题】If a nation has an open economy, it means that the nation:
A.
Allows private ownership of capital
B.
Has flexible exchange rates
C.
Has fixed exchange rates
D.
Conducts trade with other countries
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