有人对某种新化学物进行经口急性毒性试验,实验结束后,获得各组数据如下表,实验者希望通

题型:单项选择题 A3/A4型题

问题:

有人对某种新化学物进行经口急性毒性试验,实验结束后,获得各组数据如下表,实验者希望通过改进寇氏法计算该化学物的LD50。

如果已知标准误公式为,请给出LD的95%可信区间范围()

A.20.44~24.76mg/kg

B.21.41~23.62mg/kg

C.15.00~31.30mg/kg

D.18.00~26.10mg/kg

E.19.21~24.76mg/kg

考点:公卫执业医师公卫执业医师模拟试题(六)第四单元
题型:单项选择题 A3/A4型题

The Statue of Liberty(自由女神像)is one of the most famous tourst places in the United Stafes.However,it wasn’t the Americans who designed and built it It was given as a gift of friendship from France.

In 1865,a young French artist named Bartholdi took part in a big party near the town of Versailles.At the party,someone hoped to give America a special gift for the country’s hundredth birthday in 1876.Bartholdi was interested in the idea and suggested a big statue of some kind.Back home,he thought about it for the next six years.By 1871,Bartholdi had planned most of the details of the statue.It was going to be a lady calld Liberty,who held a torch(火把)high over her head in hear right hand and a book close to her body in her left hand.It seemed that she was lighting the way to freedom.

But it was such a huge project that a large amount of noney was needed.And also,for many resaon,Bartboldi and his team couldn’t finish it on time.The big statue wasn’t finished until June 1884.On July22,1885,it arrived in New York from France by water.The statue was finally placed on a small island called Manhattan near New York in April 1886.

根据材料内容选择最佳答案。

小题1:Who first had the idea of giving a hundredth birthday gift to America?

A,The host of the party.   B.The president of France

C.Bartholdi     D.It isn’t mentioned

小题2:We know the United States of America was set up in _____ according to the passage.[

A.1765

B.1771

C.1776

D.1786小题3:What’s in the left hand of the lady called Liberty?

A.A book

B.A fan

C.A torch

D.A hat小题4:The statue was carried to New York _____ after it was finished.

A.on the airplan

B.on the sea

C.in the car

D.on the train小题5:Which of the following is TRUE,according to the passage?

A.The statue of Liberty was built by an American who lived in France.

B.The building of the statue of Liberty cost much mony.

C.The building of the statue of Liberty was finished in 1886.

D.The ststue of Liberty appeared in New York on time.

题型:单项选择题 A3/A4型题

简述理论联系实际原则的内容。

题型:单项选择题 A3/A4型题

汇票持票人甲公司在汇票到期后即请求承兑人乙公司付款,乙公司明知出票人丙公司的破产案件被人民法院受理,仍予以付款。根据票据法律制度的规定,下列表述中,不正确的是( )。

A.乙公司付款后可以向丙公司行使追索权
B.乙公司可以要求甲公司退回所付款项
C.乙公司付款后可以向出票人丙公司的破产管理人中报债权
D.在持票人请求付款时,乙公司不能以丙公司破产为由而抗辩

题型:单项选择题 A3/A4型题

在国内建设项目管理实践中,越来越多的建设项目倾向于按照国际惯例进行管理并尝试采用()。

A.项目协助管理模式 

B.委托项目管理模式 

C.自行项目协助管理模式 

D.合同项目管理模式

题型:单项选择题 A3/A4型题

根据操作牌制度,操作者无操作牌则()启动、操作。

A.可以

B.不可以

C.有权

D.无权

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