下列物质的稀溶液中,溶质的阴、阳离子个数之比为1∶2的是 A.Na2HPO4 B

题型:选择题

问题:

下列物质的稀溶液中,溶质的阴、阳离子个数之比为1∶2的是

A.Na2HPO4

B.NaHSO4

C.(NH42SO4

D.K2S

考点:弱电解质电离的影响因素弱电解质的电离度弱电解质的电离
题型:选择题

男性,40岁。因车祸发生脾破裂,就诊时血压8/4kPa(60/30mmHg),脉率120次/分,病人烦躁不安,皮肤苍白,四肢湿冷。

不正确的护理措施是()。

A.吸氧,输液

B.置热水袋保暖

C.平卧位

D.测每小时尿量

E.测中心静脉压

题型:选择题

After five hours' drive, they reached____they thought was the place they had been dreaming.  [ ]

A. that

B. where

C. which

D. what

题型:选择题

某同学按下列步骤对一种无色溶液进行鉴定实验.请你根据他实验报告中的步骤和现象,填写相应的实验结论(该溶液只含有一种溶质).

实验步骤实验现象实验结论
(1)取该溶液少许,向其中加入几滴酚酞试液.溶液没有颜色变化.该溶液一定不显______性.(选填“中”“酸”或“碱”)
(2)另取该溶液少许,向其中加入锌粒并把燃着的木条放在试管口.有无色气体放出,该气体能燃烧,火焰呈淡蓝色.生成的气体是______;说明该溶液中的溶质属于______类.(填“酸”“碱”或“盐”)
(3)再取该溶液少许,向其中加入稀盐酸,再加入适量BaCl2溶液.加入盐酸没有明显现象,加入BaCl2溶液后有白色沉淀产生.白色沉淀是______;说明原溶液为______溶液.(填溶质化学式)

题型:选择题

Visiting U.S. President George W. Bush said in Beijing Friday that both China and the United States should encourage bilateral(双边的) contacts and exchanges to promote mutual(相互) understanding.

“It’s important for our political leaders to come to China,” said Bush, who gave a speech Friday morning at Qinghua University, one of the most prestigious universities in China.

His working visit to China and discussions with Oinghua students “help promote” Sino-U.S.(中美) relations, Bush said in response to a student’s question about what he would do to promote Sino-U.S. relations.

“Many people in my country are very interested in China,” he said, adding that these Americans have learned more about China’s culture and the Chinese people.

He said that he would keep encouraging such contacts and exchanges between the two countries.

Bush said that he would describe back home what he has seen here and that China as a great nation not only has a “great history” but also an “unbelievably exciting future.”

The president said that the 2008 Olympic Games would make a significant opportunity for the rest of the world to understand China, which enables more people to come to China and feel the modernization taking place, and many more people will see it on the television.

Bush arrived in Beijing Thursday for a two-day working visit to China.

小题1:What the word “prestigious” in the second paragraph probably means?

A.great

B.famous

C.honorable

D.modest小题2:Which of the sentence is NOT true?

A.Bush think bilateral contacts and mutual understanding will promote Sino-U.S. relations.

B.Many Americans are interested in China.

C.Bush and the students of Qinghua discussed something about how to make China richer and stronger.

D.The 2008’s Olympic Games is a great change for China been known by the world.小题3: Many Americans are interested in China because _______.

A.they want to come here to take part in the 2008 Olympic Games

B.they have learned something of China and they want to learn more

C.China has been taking place great change

D.China has a “great history” and “unbelievably exciting future”小题4:The narrator(叙述者) of the passage was most probably _____.

A.a reporter

B.a psychologist

C.a politician

D.a sociologist

题型:选择题

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