解释下列事实的反应方程式正确的是 A.氨气遇氯化氢时产生白烟:NH3+HCl=N

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问题:

解释下列事实的反应方程式正确的是

A.氨气遇氯化氢时产生白烟:NH3+HCl=NH4Cl

B.铜与浓硫酸共热产生气体:Cu+H2SO4(浓)CuSO4+H2

C.铁钉在潮湿的空气中很快被腐蚀:Fe—3e-=Fe3+

D.纯碱溶液能清洗油污:CO32+2H2O H2CO3+2OH-

考点:离子方程式
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某项目公司借得一笔银行贷款,名义年利率为6.6%,按季计息,其有效年利率为 ( )。

A.6.71%

B.6.77%

C.6.80%

D.6.83%

题型:选择题

W/O型气雾剂为()

A.单相气雾剂

B.二相气雾剂

C.四相气雾剂

D.三相气雾剂

E.均不是

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Betty and Harold have been married for years.But one thing still puzzles old Harold.How is it that he can leave Betty and her friend Joan sitting on the sofa,talking,go out to a ballgame,come back three and a half hours later,and they’re still sitting on the sofa?Talking?

What in the world,Harold wonders,do they have to talk about?

Betty shrugs.Talk?We’re friends.

Researching this matter called friendship,psychologist Lilian Rubin spent two years interviewing more than two hundred women and men.No matter what their age,their job,their sex,the results were completely clear:women have more friendships than men,and the difference in the content and the quality of those friendships is “marked and unmistakable.”

More than two-thirds of the single men Rubin interviewed could not name a best friend.Those who could were likely to name a woman.Yet three-quarters of the single women had no problem naming a best friend,and almost always it was a woman.More married men than women named their wife/husband as a best friend,most trusted person,or the one they would turn to in time of emotional distress(感情危机).“Most women,”says Rubin,“identified at least one,usually more,trusted friends to whom they could turn in a troubled moment,and they spoke openly about the importance of these relationships in their lives.”

“In general,”writes Rubin in her new book,“women’s friendships with each other rest on shared emotions and support,but men’s relationships are marked by shared activities.”For the most part,Rubin says,interactions(交往)between men are emotionally controlled-a good fit with  the social requirements of “manly behavior.”

“Even when a man is said to be a best friend,”Robin writes,“the two share little about their innermost feelings.Whereas a woman’s closest female friend might be the first to tell her to leave a failing marriage, it wasn’t unusual to hear a man say he didn’t know his friend’s marriage was in serious trouble until he appeared one night asking if he could sleep on the sofa.”

小题1:What old Harold cannot understand or explain is the fact that_____.

A.he is treated as an outsider rather than a husband

B.women show little interest in ballgames

C.women have so much to share

D.he finds his wife difficult to talk to小题2:Rubin’s study shows that for emotional support a married woman is more likely to  turn to _____.

A.a male friend

B.her parents

C.a female friend

D.her husband小题3:According to the text,which type of behavior is NOT expected of a man by society?

A.Ending his marriage without good reason.

B.Complaining about his marriage trouble.

C.Spending too much time with his friends.

D.Going out to ballgames too often.小题4:Which of the following statements is best supported by the last paragraph?

A.Women are more serious than men about marriage.

B.Men keep their innermost feelings to themselves.

C.Men often take sudden action to end their marriage.

D.Women depend on others in making decisions.小题5:The research done by psychologist Rubin centers around_____.

A.friendships of men and women

B.happy and successful marriages

C.emotional problems in marriage

D.interactions between men and women

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下列药物的含量测定方法为:阿司匹林片()

A.溴量法 

B.碘量法 

C.双相滴定法 

D.两步滴定法 

E.沉淀滴定法

题型:选择题

试述怎样才能提高压力变送器(电气)的使用精确度。

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