在加密技术的实际应用中,保密的关键是( )。A) 算法 B) 密钥 C) 算法和密

题型:单项选择题

问题:

在加密技术的实际应用中,保密的关键是( )。

A) 算法
B) 密钥
C) 算法和密钥
D) 以上都是

考点:计算机等级考试网络技术三级网络技术笔试
题型:单项选择题

阅读短文,选择正确答案。

    Jane Scott is fourteen and the year before last she began to study in a middle schoo1. She likes dancing and

singing and spending a lot of time on them. But she hates (不喜欢) maths and does not work hard at it. 

    She thinks it difficult to learn. She falls behind her Classmates and once failed the maths exam. She decided to

drop (放弃) it. Her father is angry with her when he knows about it. 

    It was Sunday. Mr Scott gave a call to his sister who teaches maths in another schoo1. He hoped she would

come and tell his daughter how to learn maths. The woman came quickly and said, "You're a clever girl, Jane.

I'm sure you'll soon do well in maths if you work hard at it." 

    "I'm afraid I can't, Aunt," said Jane. "Girls can't be good at maths."

    "I don't think so." said the woman. "I was good at it when I was a girl. You must do more exercises and

practice a maths problem again until you master (掌握) it. Remember:Practice makes perfect (熟能生巧). 

    Well, it's a maths problem. Think about it and practice it again and again and you'll work it out."

    "OK." said the girl, "Let me try." 

    About an hour later Jane took the exercise book to her aunt and said, "I've done the problem ten times."

    "Well done!" Her aunt said happily. "What result did you get?"

    "Ten answers."

1.Jane is not good at ________.[ ]

A.dancing

B.singing

C.maths

D.Chinese

2.Jane falls behind her classmates in maths because ________. [ ]

A.she doesn't work hard at it

B.she doesn't like it

C.she spends much time on other lessons

D.she isn't clever

3.Mr Scott hoped his sister would help his daughter because ________.[ ]

A.she is a maths teacher

B.Jane likes it

C.Jane is afraid of her

D.she is Jane's aunt

4.The woman told the girl ________. [ ]

A.it was easy to learn maths

B.to work hard at maths

C.maths was important

D.maths was interesting

5.Which of the following is NOT true? [ ]

A.Jane decided to drop maths.

B.Jane didn't like maths.

C.Jane began to study in middle school when she was twelve.

D.Jane didn't work out the maths problem at all.

题型:单项选择题

支配大腿内侧群肌肉的神经是()

A.闭孔神经

B.坐骨神经

C.股神经

D.阴部神经

E.隐神经

题型:单项选择题

甲、乙两位学生参加数学竞赛培训,在活动期间,他们参加的5次测试成绩记录如下:甲   82  82  79  95  87           乙   95  75  80  90  85

(1)用茎叶图表示这两组数据;

(2)若要从中选派一人参加数学竞赛,从统计学的角度考虑,你认为选派哪位学生参加合适?说明理由.

题型:单项选择题

脓液中的中性粒细胞只有少数具有吞噬能力,大多已发生变性和坏死,称为________。

题型:单项选择题

私募基金不能进行公开的发售和宣传活动,投资金额要求高,投资者的资格和人数常常受到严格限制。 ( )

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