在参照国际标准的基础上，从我国实验动物实际情况出发常将实验动_爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题单项选择题

在参照国际标准的基础上，从我国实验动物实际情况出发常将实验动物分为以下几级：（）

A．普通动物、悉生动物、无菌动物

B．普通动物、悉生动物、清洁动物、无菌动物

C．普通动物、无特定病原体动物、无菌动物

D．普通动物、清洁动物、无特定病原体动物、无菌动物

答案

参考答案：D

阅读理解

The 30th Olympic Games was held from July 27th to August 12th in 2012 in London,United Kingdom.London has hosted the modern Olympic Games three times in the history of Olympic Games.

The Beijing-Shanghai High-Speed Railway was put into operation at the end of June,2011.The journey takes about five hours.The train can reach speeds of up to 300 kilometers an hour.The passenger volume(容量)is expected to reach 160 million a year,marking a great step in China’s Railway development.

The 2014 FIFA World Cup will be the 20th FIFA World Cup,an international association football tournament that will take place in Brazil from June 13th to July 13th in 2014.This will be the second time the country has hosted the competition,the first being the 1950 FIFA World Cup.Brazil will become the fifth country to have hosted the FIFA World Cup twice,after Mexico,Italy,France and Germany.It will be the first World Cup to be held in South America since the 1978 FIFA World Cup in Argentina.

小题1:The 30th Olympic Games was held in______.

小题2:How many times did London host the modern Olympic Games?

小题3:The Beijing-Shanghai High-Speed Railway was put into operation at the end of______,2011.

小题4:The 2014 FIFA World Cup will be held in______.

小题5:Brazil hosted the competition for the first time in______.

单项选择题

在使用微软公司的Word 2000办公的时候，为了防止计算机意外死机或者停电带来的麻烦，通常需要使用 (1) 设置文档的自动保存功能；在复制了文档后，需要快速的粘贴所复制的内容，通常使用快捷键 (2) ；在Word文档录入完毕的时候，突然发现把所有”千古”误写为”钱谷”，则可以用 (3) 命令快速改正错误。

A．“编辑”→”查找”

B．“编辑”→“替换”

C．“编辑”→“定位”

D．”文件”→“搜索”