线性表进行二分法检索,其前提条件是( )。A.线性表以顺序方式存储,并按关键码值排好

题型:单项选择题

问题:

线性表进行二分法检索,其前提条件是( )。

A.线性表以顺序方式存储,并按关键码值排好序

B.线性表以顺序方式存储,并按关键码的检索频率排好序

C.线性表以链式方式存储,并按关键码值排好序

D.线性表以链式方式存储,并按关键码的检索频率排好序

考点:计算机等级考试VISUALFOXPRO二级VISUALFOXPRO笔试
题型:单项选择题

阅读理解。

     The Internet has become not only a necessary but also a virtual (虚拟的) world for people. With the

development of the Internet, internet friendship has also become very popular. Online friends are those people

who have known each other through the Internet. Making internet friends is the same as making pen friends.

Many famous websites offer quite warm internet friendship. One can find many people on these websites and

they share the same interests. It is difficult to make friends with someone you can't see or feel. That is the

main problem of internet friendship. A virtual friendship would not last forever without seeing each other, but

it is an advantage for some people because they are afraid to speak in pubic.

     On the other hand, the chances of cheating (欺骗) are very high in an internet friendship. Some people

make friends on the Internet with wrong intentions (企图).So while making friends over the Internet, one has

to be very careful. Here are some suggestions for you. ·Don't give personal information, such as your

telephone number, address, location, school name as well as your parents' information, to strangers on the

Internet. 

      ●Do not exchange personal photos of you or any family member with people you meet over the Internet.

      ●Do not go to meet a person you have just met over the Internet. You'd better ask older or other 

experienced people for advice if you want to go to meet an internet friend.

      ●Do not accept someone's request (要求) if you feel he or she is dishonest.

1. Is the Internet necessary and virtual for people?

   ______________________________________________________________________

2. What is the main problem of internet friendship? 

   ______________________________________________________________________ 

3. Why is the virtual friendship an advantage for some people?

   ______________________________________________________________________

4. Who can you ask for advice if you go to meet an internet friend?

   ______________________________________________________________________ 

5. What does the article give suggestions about?

   ______________________________________________________________________

题型:单项选择题

防止羊毛缩绒的方法有().

A.碱减量处理法

B.拉伸细化法

C.氧化法

D.氢氧化钠膨胀

题型:单项选择题

钢斜拉桥施工通常采用()。

A.顶推法

B.转体法

C.悬臂浇筑法

D.悬臂拼装法

题型:单项选择题

简述被子植物雄配子体的发育及其基本结构。

题型:单项选择题

卤代烷用系统命名法命名,选择()作为主链。

A、含碳原子数最多的碳链

B、含卤原子的最长碳链

C、含卤原子的最短碳链

D、不含卤原子的最长碳链

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