下表列出了国外几个城市与北京的时差(带正号的数表示同一时刻比北京时间早的时数)城

题型:操作题

问题:

下表列出了国外几个城市与北京的时差(带正号的数表示同一时刻比北京时间早的时数)
城市
纽约
巴黎
东京
时差
-13
-7
+1
(1)如果北京时间14:00,那么三个地区的时间分别是多少?
(2)如果小明想给远在纽约旅游的爸爸打电话,他在北京时间下午2:00打电话,你认为合适吗?说明理由。
考点:正数与负数
题型:操作题

假定开发商李某在甲、乙、丙、丁四种方案之间做出选择,每种方案郛有风险和收益,但每种方案的收益事先不确定,都面临繁荣和衰落两种可能出见的市场状态,在每种市场状态下四种方案的收益都不相同,为了确定哪种方案妻好,开发商列出了每种方案不同市场情况下的收益表(见下表)。    

按照不同的决策方法,试回答以下问题:

方案 市场繁荣的收益率(%) 市场衰落的收益率(%)

甲 20 -11

乙 17 -2

丙 25 -6

丁 8 4

假定开发商李某选择赛维奇后悔表法进行决策,应选择()方案。

A.甲

B.乙

C.丙

D.丁

题型:操作题

James Arruda Henry, a 98-year-old retired lobsterman, has written and published his first book, "In a Fisherman's Language", after learning to read at the incredible age of 91.

Mr. Henry spent most of his life without even his closest family members knowing he was illiterate (文盲).Forced to quit school in the third grade to take some jobs, he kept the secret close to his chest - only telling to his late wife.

A family problem in his 90s sparked his encourage to restart his education."He signed a document he could not read," Mr Henry's granddaughter said. And then, after hearing about George Dawson, a son of slaves who learned to read at the age of 98 and went on to write a book of his own, entitled "Life Is So Good" at the age of 101, Mr. Henry took up reading.

"If he can do it.I'm going to try," Mr. Henry said.Starting with his name, he eventually moved on to ABC’s and children's books. He put them down for four years after the tragic loss of his wife. But eventually he went back to reading and with the help of his tutor began to record his life.

He wrote about his family’s voyage from Portugal to the U.S. his many journeys at sea and how he was unable to save another fisherman who had fallen overboard. He became a carpenter and even a professional boxer - and eventually built his own home in Stonington Borough.

His life stories have become so popular, in fact, nearly 800 copies were sold in the first two weeks of the book's release last month.One thousand more have since been printed as requests for the book flood in from as far as Germany.And now even Hollywood producers have approached Mr. Henry about optioning the rights to his life story for a big screen adaptation.

小题1:Which of the following is true of Mr. Henry?

A.He couldn't read when he was retired.

B.He was not a good student at school.

C.Only his family members knew he was illiterate.

D.He published his book at the age of 91.小题2:Mr. Henry made up his mind to study because he           

A.had some trouble with his granddaughter

B.couldn't sign the document he was given

C.wanted to share his own experience with others

D.was inspired by George Dawson's story小题3:In his book, Mr. Henry didn't mention ____.

A.his family story

B.his school education

C.his journeys at sea

D.his work experiences小题4:What's the main idea of the last paragraph?

A.Nearly 800 copies of the book were sold.

B.The book was sold well in Germany.

C.His book was popular both at home and abroad.

D.Hollywood has planned to adapt his book for a movie.

题型:操作题
关于摩擦力,下列说法中错误的是(  )

A.滑动摩擦力的大小跟物体间的压力和接触面的粗糙程度有关

B.在相同条件下,滚动摩擦比滑动摩擦小

C.在任何情况下摩擦力总是有害的

D.轮胎上有凹凸不平的花纹,是为了增大摩擦

题型:操作题

陈旧性心肌梗死患者,心电图示频发室性期前收缩,首选药物是()

A.慢心律

B.普罗帕酮(心律平)

C.奎尼丁

D.β受体阻滞剂

E.钙拮抗剂

题型:操作题

剪纸这门艺术在()广为流传

A、南方

B、西北

C、东南

D、北方

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