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【单选题】
It weighs less than three pounds and is hardly more interesting to look at than an overly ripe cauliflower. ___________________________________________. It has created poetry and music, planned and executed horrific wars, and devised intricate scientific theories. It thinks and dreams, plots and schemes, and easily holds more informa¬tion than all the libraries on Earth.A.
The human brain is made of gelatinous matter and contains no nerve endings.
B.
The science of neurology has found a way to map the most important areas of the human brain.
C.
Nevertheless, the human brain is the most mysterious and complex object on Earth.
D.
However, scientists say that each person uses only 10% of his or her brain over the course of a lifetime!
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【简答题】、 和 构成了地图的数学法则。
【简答题】用RSA算法加密时，已知公钥是(e=7，n=20)，私钥是(d=3，n=20)，用公钥对消息M=3加密，得到的密文是( )。 A) 19 B) 13 C) 12 D) 7
【单选题】（ 53 ）用 RSA 算法加密时，已知公钥是（ e=7,n=20 ） ，私钥是（ d=3,n=20 ） ，用公钥对消息 M=3 加密，得到的密文是 A ） 19
B.
） 13
C.
） 12
D.
） 7