砂浆试件在冻或融试验中，篮框与容器底面或地面应架高（）A.10mm B.15mm C

Rio de Janeiro(里约热内卢) will host the 2016 Olympic Games. The International Olympic Committee announced(宣布) it on October 2,2009.Rio de Janeiro beat Chicago, Tokyo and Madrid to win the bid(中标).It will be the first South American city to host the Olympics. The city will also host the 2014 World Cup. Rio de Janeiro is the second largest city in Brazil.

*Population: 6 million

*Language: Portuguese

* Rio de Janeiro has the world’s largest urban forest(城市森林),Which is made up of many kinds of green plants.

*Every year Rio de Janeiro holds a carnival(狂欢节). It is like a  big party. People dress up, dance samba and have fun. It usually lasts for a week. More than two million tourists come to Rio de- Janeiro every year. About half a million people visit the city for the carnival each year.

小题1:Rio de Janeiro beat the other      cities to win the bid For the 2016 Olympic Games.

A．five

B．four

C．three

D．two小题2:If you have a visit to Rio de Janeiro, you can see a large Number of      in the city.

A．animals

B．trees

C．lakes

D．players小题3:Which of the following is TRUE?

A．We can have fun in the carnival for nine days.

B．The carnival in Rio de Janeiro is held every four years.

C．Both people in Rio de Janeiro and tourists can take party in the carnival.

D．About one million people visit Rio de Janeiro for the carnival each year.小题4:We can see the passage in a     .

A．storybook

B．tour book

C．geography book

D．science book

关于因特网中的WWW服务，以下说法甲，错误的是______ 。

A．WWW服务器中存储的通常是符合HTML规范的结构化文档

B．WWW服务器必须具有创建和编辑Web页面的功能

C．WWW客户端程序也被称为WWW浏览器

D．WWW服务器也被称为Web站点

甲、乙两个人月工资比为5:3，月支出比为3:2，结果甲每个月可以结余1500元，乙每个月可以结余700元。求甲每个月的工资比乙多多少元（）

A．1600

B．1800

C．2000

D．2400

同样容量、同样结构的异步电动机，转速高的体积小、价格低。

下列属于原癌基因的激活机制有（）

A.原癌基因点突变

B.原癌基因获得外源启动子

C.原癌基因甲基化程度降低

D.原癌基因的克隆

E.原癌基因的拷贝数增加