某深埋隧道为圆形隧道,半径为4.0m,围岩水平应力与垂直应力相等,应力为户=1000

题型:单项选择题

问题:

某深埋隧道为圆形隧道,半径为4.0m,围岩水平应力与垂直应力相等,应力为户=1000kPa,围岩内聚力c=20kPa,内摩擦角为30°,按芬纳(Fenner)公式计算,若使支护力为0,松动半径应为()m。

A.4

B.10

C.13

D.15.5

考点:注册土木工程师岩土工程专业案例注册岩土工程师专业案例下午试卷
题型:单项选择题

In the world ,soccer of football is the most popular sport. This is because many countries have wonderful teams for the World Cup. The World Cup is held every four years.

To remember 2002 FIFA World Cup ,children from different countries  and more than 60 children from Japanese schools came together and spent three weekends drawing a big picture called“Dream(梦幻) World  Cups” in Japan .The children drew animals, flowers and people playing soccer under a blue bright sky. They wished each football team good  luck by drawing the  flags(旗帜)of all the countries that will take part in the World Cup in Japan and South Korea. The picture was put up in a park near a playground in Yokohama .Some football teams will   have games there.

Are you a football fan(迷)?The World Cup makes more and more people interested in football. Teenagers(青少年)like playing and  watching football .Many of them love some football stars so much that they get the pictures of their favorite players on the walls of their rooms. That is the way to show their love for the World Cup as children in Japan.

小题1:If a country wants to take part in the World Cup ,she must have______.

A.Many football fan

B.a very good team  

C.many football player  

D.a big playground小题2:From the passage, in the picture children drew many things except______.

A.people playing football 

B.pictures of some football stars  

C.a sunny sky  

D.flowers小题3:In“Dream World Cup”,the children drew the flags of some countries______.

A.to show their love for their own country

B.to tell the people their stories

C.to show their good wishes for the football teams

D.to show their new ideas about football.小题4:Many teenagers have the pictures of some football stars because___.

A.they are interested in football

B.they are football fans

C.they think their favorite players are great

D.all of A,B and C

题型:单项选择题

下列词语中加横线的字,字形、注音完全正确的一项是[ ]

A、稍(xùn)        喧(rǎng)       灵(jiǔ)           角分明(léng)

B、脚(huái)       逗(liáo)         褴褛(làn lǚ)       一黄土(póu)

C、凿(ruì)         (zhào)           咀(jué)          孜孜不倦(zī)

D、(wǎn)          耕(chuò)       徒(xiǎn)        恃才放(kàng)

题型:单项选择题

兴趣小组选用如下装置(装置气密性良好)制CO2,并进行有关实验。

(1)实验室制取CO2的化学方程式为________________。

(2)兴趣小组往石灰石中逐滴滴入新配制的盐酸,并将所得气体通入澄清石灰水中,但石灰水始终没有浑浊现象。石灰水为什么没有浑浊呢?请你利用必需实验用品和限选试剂(限选试剂:Na2CO3溶液、酸化的AgNO3溶液、紫色石蕊溶液)完成探究过程:

【提出猜想】①____________;②____________;③上述两种猜想同时存在。

【设计与实验】请你设计实验方案,验证猜想①和猜想②,并将相关内容填在下表:

题型:单项选择题

工业废气中的二氧化氮会对大气造成污染.对其污染治理的反应原理之一为:2NO2+2NaOH═NaNO2+NaNOX+H2O,则x的值为(  )

A.1

B.2

C.3

D.4

题型:单项选择题

T淋巴细胞白血病的病原体是

A.HIV
B.HBV
C.HPV
D.HSV
E.HTLV

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