某细菌属于肠杆菌科中的一个属，能够在4℃生长，所致胃肠炎又称为“冰箱病”该病原菌为（

2010年10月1日18时59分57秒，随着嫦娥二号在西昌卫星发射中心成功升空，中国探月工程二期揭开序幕。作为工程二期的技术先导星，嫦娥二号的主要任务是为嫦娥三号实现月面软着陆开展部分关键技术试验，并继续进行月球科学的探测和研究。火箭把卫星送入近地点高度200公里、远地点高度约38万公里的地月转移轨道。这标志着我国成功突破直接地月转移轨道发射技术。奔月时间比嫦娥一号减少7天。

 （1）嫦娥二号探月属于哪种实践活动？实践具有哪些特点？

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 （2）材料是如何体现实践是认识的基础的？

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What will we be eating in the future? Here are the top factors that will be affecting the food that ends up on our tables in the new century.

Genetically engineered food Many crops are already genetically engineered, often to produce more food, fight against pests or improve nutrition. But concern is growing over the lasting effects of changing nature. While existing research has found little harm in genetic engineering, a recent study found the flower powder of a genetically engineered corn can kill the normal butterfly. This finding made many people nervous and brought attention to the topic.

Dining out Americans are increasingly eating meals away from home, both in sit-down restaurants and in fast food outlets. In the last decade alone there was a 14 percent decrease in the number of meals eaten at home. At the same time, restaurants are just beginning to really open their doors on the Internet. Websites exist to make restaurant reservations (预约), view menus, and get tips from your favorite chefs. The dining out trend and the demand for high-quality, chef-prepared food have encouraged chefs to spend time out of the kitchen — teaching classes, appearing on TV, and writing cookbooks.

Eating in Eating in doesn’t always mean cooking. Ready-made meals and frozen food sold in supermarkets taste better all the time. Restaurants are offering neatly packaged “food to go”, and meals can be ordered over the Internet. Cooking is not as much as a necessity, as it is a hobby or a special treat.

Agriculture Although American farmers have been hit hard recently by bad weather, low prices and decreasing government help, they can increase grain production not using old farming methods.

小题1:Which of the following is the main reason for genetically engineered crops?

A．To lead to more food and better nutrition.

B．To kill the normal butterfly.

C．To reduce the harm done by insects.

D．To change the nature of the crops.小题2:From the passage, we learn that _________.

A．eating out is not popular among the old people in USA

B．it is now easier for people to get information about eating out

C．it is popular for restaurants to send out information on the Internet

D．the trend of eating out is causing many chefs to give up their jobs小题3:In the future, cooking at home will probably _________.

A．still be the job of most housewives

B．take up most of people’s free time

C．bring much joy to more people

D．lead to many restaurants closing down小题4:According to the passage, farmers should _________ to get a higher grain production.

A．turn to better farming methods

B．ask for the support of the government

C．raise the prices of crops

D．not care about the effects of bad weather

胎儿脊柱裂的声像图表现，下列哪一项说法不正确（）。

A.脊柱中线缺损

B.胎儿躯干纵切图上，脊柱结构中断

C.胎儿躯干横切图上呈“U”字型

D.胎儿小脑可显示香蕉症

E.脊管呈封闭的环状强回声

空间探索自开始以来一直受到指责，但我们已经成功地通过卫星进行远程通信、预报天气、开采石油。空间探索项目还会有助于我们发现新能源和新化学元素，而那些化学元素也许会帮助我们治愈现在的不治之症。 这段文字主要告诉我们，空间探索( )。

A．利弊并存

B．可治绝症

C．很有争议

D．意义重大

进行有关化学液体的操作时，应使用防护面罩保护面部。