(),这种性能称为树脂的离子交换的选择性。

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问题:

(),这种性能称为树脂的离子交换的选择性。

考点:锅炉水处理工锅炉水处理工题库
题型:填空题

某难挥发非电解质稀溶液的沸点为100.400℃,则其凝固点为()。(水的Kb=0.512K·kg·mol-1,Kf=1.86K·kg·mol-1

A.-0.110℃

B.-0.400℃

C.-0.746℃

D.-1.45℃

题型:填空题
直接写出得数
400÷20=125×8=45×30=730+670=
540-190=28×25=201×4=600×8=
题型:填空题

根据短文内容按要求完成下列各题。

The fox installs(安装) a telephone, but no one telephones him. He feels very unhappy.

In his dream he dreams that someone calls him. He decides to call back.

First he calls the crow (乌鸦), but the crow says she didn’t telephone him because he is still angry with him. As you know, the fox cheated the crow of her meat by asking her to sing a song.

Then the fox rings Aunt Bear. When she learns it is the fox’s voice, the bear loses her temper (脾气) because the fox cheated her of her honey several days ago. She tells him that she would never telephone him.

At last he calls the wolf. The wolf is sleeping at the moment. When he knows it is the fox who telephones him, he becomes so angry that he says he will never forgive (原谅) the fox. You know, once the fox led him into the hunter’s trap (圈) .

From then on, the fox never telephones others and his telephone becomes useless.

小题1:Who telephones the fox after he installs a telephone?(根据短文内容回答问题)

_____________________________________________________________________________

小题2:Why does Aunt Bear lose her temper when she learns it is the fox’s voice?(根据短文内容回答问题)

                                                                             

小题3:How many animals does the fox telephone?(根据短文内容回答问题)

                                                                             

小题4:He becomes so angry that he says he will never forgive the fox. (改为同义句)

He becomes ________ angry__________ forgive the fox.

小题5:In the passage, the underlined word “He” refers (指) to ________.

题型:填空题

在因特网的路由选择协议中,属于外部网络协议的是 (1) ,按固定时间间隔和相邻路由器交换路由表信息的协议是 (2) 。该协议最大特点是 (3) ,它使用 (4) 传输信息。此协议报文最大长度、最多可包括的路由数和最大距离分别是 (5)

1()

A.IGP

B.RIP

C.OSPF

D.BGP

题型:填空题

云的观测结果应当具有怎样的代表性?

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