1纳米=0.000000001米,则250纳米等于______米(用科学记数法表

题型:填空题

问题:

1纳米=0.000 000 001米,则250纳米等于______米(用科学记数法表示).

考点:科学记数法和有效数字
题型:填空题

Although there are no state controlled survival courses in Britain or the United States,there are various independent organizations offering similar activities.Students can participate(take part)in outdoor training courses through university clubs and societies.Anyone can register with such groups,which then organize courses,training and trips for all members.

One of the most popular outdoor training programmes in both the US and Britain is Outward Bound(户外训练).It was founded in 1941 in Wales and attracts hundreds of thousands of adventurous types every year. The courses are intended to broaden minds through experiences that build confidence, self-esteem(自尊)and character.As well as specialist courses such as canoeing,leadership skills and sailing,participants can take part in week long adventure training camps which include a host of sports and survival training education skills.

Michael Williams,an American student,took part in an Outward Bound course last year.He said:“We learned lots of first aid skills,lots of natural history ,lots of environmental facts, and participated in a wildlife preservation programme.Beyond that,my favorite skills learned were sailing and rock climbing.”Courses can last up to 40 days and are open to anyone over the age of 14.Students must be in general good health,but do not need to be experienced in outdoor-sports.There is no selection process;everyone is welcome,although new participants are advised to pick a course matching their physical capacity.Most of the British courses take place in the Brecon Beacons in Wales.Another similar organization is the UK Survival School,which includes courses on learning to 1ive with the environment, sailing and  winter survival.On a basic survival weekend students will learn how to get water and food, how to make fire and cook with it,to find and build a shelter,control survival life support,how to cross rivers.Send off a distress signal,and to use compasses(指南针)by day and night.

According to the leaders,such adventures are “an awakening, an exploration into the unknown.”Outward Bound believes that participants will “use mind and body traveling some of the Earth’s roughest wilderness areas.”   

小题1:In Britain and the United States,survival courses are popular with    

A.old people

B.young people

C.dangerous people

D.weak people小题2:The advantage of the training courses is that   .

A.participants can make friends with others

B.participants can visit some places of interest

C.participants can experience different adventures

D.participants can learn how wonderful nature is小题3:In an Outward Bound course last year,the most exciting experience Michael Williams had was   .

A.learning first aid skills

B.collecting facts of environment

C.rock climbing and sailing

D.preserving wildlife

题型:填空题

I would like a job which pays more, but ___ I enjoy the work I’m doing at the moment.

A.in other words

B.on the other hand

C.for one thing

D.as a matter of fact

题型:填空题

提出冲力说的人是()

A、毕达哥拉斯

B、阿基米德

C、欧几里得

D、斐劳波诺斯

题型:填空题

诊断新生儿Rh溶血病有确诊意义的试验是:()

A.患儿血清游离抗体

B.婴儿血型

C.母亲血型

D.患儿红细胞直接抗入球蛋白试验

E.改良法抗人球蛋白试验

题型:填空题

大剂量、久服易引起浮肿的是哪味药()

A.山药

B.白术

C.黄芪

D.甘草

E.党参

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