以下属于非对称密钥算法的是()。
A.RSA
B.DSA
C.DES
D.DH
参考答案:A, B, D
“神舟”六号飞船在空中飞行了235万千米,读作( )万千米。
I'm sorry ______ you that you didn't pass the maths exam. [ ]
A. tell
B. told
C. to tell
D. telling