下列图象中表示物体做匀加速直线运动的是( ) A. B. C. D.

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问题:

下列图象中表示物体做匀加速直线运动的是(  )

A.

B.

C.

D.

考点:匀变速直线运动
题型:多选题

心室肌细胞动作电位的平台期大致相当于心电图的

A.QRS波群

B.QT间期

C.ST段

D.T波

题型:多选题

(1)写出工业上高温煅烧石灰石的化学反应方程式______;其基本反应类型是______.

(2)写出①碳完全燃烧;②碳不完全燃烧的两个化学反应方程式①______,②______;此两个反应均属于基本反应类型中的______.

(3)某同学设计了下面两个实验来探究一氧化碳的性质,如图所示:分别通入一氧化碳一段时间后,发现A中血液颜色变黑.B中的小金鱼仍然活着.通过实验A,该同学想证明一氧化碳有毒,你认为通过实验B,该同学想证明一氧化碳的另一条性质是______.

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Rome had the Forum. London has Speaker's Corner. Now always–on–the-go. New Yorkers have Liz and Bill.

Liz and Bill, two college graduates in their early 20s, have spent a whole year trying to have thousands of people talk to them in subway stations and on busy street corners. Just talk.

Using a 2-foot-tall sign that says, "Talk to Me." they attract conversationalists, who one evening included a mental patient, and men in business suits.

They don't collect money. They don't push religion. So what's the point?

"To see what happens, said Liz. " We simply enjoy life with open communication."

Shortly after the September 11,2001 attacks, they decided to walk from New York City to Washington, a 270-mile trip. They found they loved talking to people along the way and wanted to continue talking with strangers after their return.

"It started as a crazy idea, "Liz said." We were so curious about all the strangers walking by with their life stories. People will talk to us about anything: their jobs, their clothes, their childhood experiences, anything."

Denise wanted to talk about an exam she was about to take. She had stopped by for the second time in two days, to let the two listeners know how it went.

Marcia had lost her husband to a serious disease. "That was very heavy on my mind," Marcia said. "To be able to talk about it to total strangers was very good," she explained.

To celebrate a year of talking, the two held a get-together in a city park for all the people they had met over the past year. A few hundred people showed up, as well as some television cameramen and reporters.

They may plan more parties or try to attract more people to join their informal talks. Some publishers have expressed interest in a book, something they say they'll consider.

小题1:What did Liz and Bill start doing after September 2001?

A.Chatting with people.

B.Setting up street signs

C.Telling stories to strangers

D.Organizing a speaker's corner小题2:What they have been doing can be described as_________.  .

A.pointless

B.normal

C.crazy

D.successful小题3:Why are Denise and Marcia mentioned in the text?

A.They knew Liz and Bill very well.

B.They happened to meet the writer of the text.

C.They organized the get-together in the city park.

D.They are examples of those who talked to Liz and Bill.小题4:What will Liz and Bill do in the future?

A.Go in for publishing.

B.Do more television programs.

C.Continue what they are doing.

D.Spend more time reading books.小题5:How do they like the idea of writing a book?

A.They have decided to wait a year or two

B.They will think about it carefully

C.They agreed immediately

D.They find it hard to do that

题型:多选题

杜环(唐)《经行记》记载:“一日五时礼天,食肉作斋,以杀生为功德。……不食猪狗驴马等肉,不拜国王父母之尊,不信鬼神,祀天(真主安拉)而已。”上述礼俗对应的宗教是()。

A.佛教

B.道教

C.基督教

D.伊斯兰教

题型:多选题

乙醇在()浓度时杀菌能力最强,用作防腐和消毒剂。

A、5%

B、15~30%

C、30~50%

D、70~75%

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