笺

在干熄焦煤气烘炉阶段，若火焰脉动应适度（）。

A.增加空气导入量

B.减少空气导入量

C.增加循环风量

D.减少循环风量

揭开维新变法运动序幕的事件是 [ ]

A．“公车上书”

B．《万国公报》的创办

C．组织强学会

D．各地宣传变法的学会．学堂的出现

PPP协议是数据链路层的一个协议，它被广泛用于接入Internet中。PPP协议是一个 (1) 。帧长为整数个字节。它克服了SLIP协议的缺点，可以进行协商，并且 (2) 。它可以分成3个层次，其中的网络层协议被称为 (3) ，包括了不同的网络层协议。利用PPP的优势，结合以太网产生了 (4) 协议，该协议可以通过简单的共享设备将多个客户网段接入到骨干网。若通过SLIP方式接入Internet，用户端p是 (5) 。

2（）

A．增加差错控制

B．增加安全认证

C．增加连接控制

D．增加交互控制

根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

     What makes one person more intelligent than another? What makes one person a genius, like the brilliant

Albert Einstein, and another person a fool? Are people born intelligent or stupid, or is intelligence the result

of where and how you live? 1_____

     We know, however, that just being born with a good mind is not enough. In some ways, the mind is like

a leg or an arm muscle. 2_____ Mental exercise is particularly important for young children. Many child

psychologists think that parents should play with their children more often and give them problems to think

about. 3_____ If, on the other hand, children are left alone a great deal with nothing to do, they are more likely

to become dull and unintelligent. 

     4_____ According to some psychologists, if parents are always telling a child that he or she is a fool or an

idiot, then the child is more likely to keep doing silly and foolish things. So it is probably better for parents to

say very positive things to their children, such as "That was a very clever thing you did." or "75 "

A. A healthy body contributes to one's intelligence.

B. Parents should also be careful about what they say to young children.

C. What people want to express is like this.

D. The children are then more likely to grow up bright and intelligent.

E. It needs exercise.

F. You are such a smart child.

G. These are very old questions and the answers to them are still not clear.

投入产出模型的假设前提。