对于无反应的气道异物梗阻成人患者，应采取的措施不包括（）。 A.启动EMS系统 B.

解方程： 2 x2-1 + 1 x+1 =1

色料减色混合中，当青色油墨与红色油墨混合后呈现什么色。（）

A、黑色

B、紫色

C、红紫色

D、兰紫色

Coffee is one of the world's most widely-enjoyed drinks. Now, a new research suggests that if you drink enough coffee, it might help you avoid certain kinds of cancer.

Dr. Mia Hashibe of the University of Utah School of Medicine was interested in the connection between coffee drinking and certain cancers of the head and neck. Researchers have looked into this before, but without reaching any firm conclusions. She said, "So this finding from our new study was quite a surprise. We didn't really have any expectation of which direction it could go into."

To sort out the confusion, Hashibe and her assistants used statistical (统计学 ) techniques to, in effect, make one big study out of the earlier smaller studies. She explained,  "Thanks to the earlier studies, we have a lot more power than earlier studies that looked at this. And we included 4,000 cancer patients who have cancer of the mouth and throat. And then 9,000 controls, people who do not have cancer. '

Those studies--in Europe and the United States--found that people who drank a lot of coffee were less likely to develop cancers of the mouth and throat. "We saw a protective effect for drinking more than 4 cups of coffee per day," Hashibe said. "This was the 40 percent decrease in risk. We did not see the same effect for drinking three cups or less per day."

Mia Hashibe said there was a weak connection between cancer risk and drinking coffee without caffeine. And she and her assistants found no proof that drinking tea provided the same protection as drinking Coffee. Their research is published in the journal Cancer Epidemiology, Biomarkers & Prevention.

Hashibe says it is not clear how coffee might protect drinkers from certain cancers. "There are a few chemicals that are known to be antioxidants （抗氧化物）in coffee. So we are thinking perhaps they are playing some sort of protective role against several cancers."

小题1:This passage is probably taken from __

A．a literature book

B．a travel journal

C．an old directory

D．a medical magazine小题2:Dr. Hashibe expected nothing of her research because __

A．it was impossible to get the desired result

B．the research was much surprising in fact

C．no conclusions had been reached before

D．the research team lacked faith in success小题3:Which of the following might have something to do with the protection against mouth cancer?

A．Coffee without chemicals.

B．Coffee without caffeine.

C．Four cups of tea a day.

D．Antioxidants in coffee.小题4:What do we know about Dr. Mia Hashibe and her research?

A．She knew for sure how coffee may affect drinkers.

B．She included 4,000 people without cancer in study.

C．She found an effect for three cups of coffee a day.

D．She based her research on several earlier studies.小题5:What would be the best title for the text?

A．Drinking Coffee May Protect Some Cancers

B．Drinking Coffee May Prevent Some Cancers

C．Drinking Coffee May Cure Some Caneers

D．Drinking Coffee May Cause Some Cancers

（12分）阅读材料，回答问题。

材料一：

材料二：

国别	国旗	含义
法国		法国国旗旗面由三个平行且相等的竖长方形组成，从左至右分别为蓝、白、红三色，三色旗三色分别代表自由、平等、博爱。
美国		美国国旗是星条旗，左上角为蓝色星区，共50颗星代表50个周，星区外是13道红白相间条纹，代表最初北美13块殖民地。红色象征勇气，白色象征自由，蓝色则象征忠诚和正义。

（l）结合所学，列出材料一所示A、B、C、D四处发生的重大历史事件。（8分）

（2）材料二中美国星条旗中的白色象征着自由。请列举为争取和巩固这种“自由”美国颁布的两部法律性文献。（4分）

变形热箱按丝束在热箱中的加热方式可分为接触式和（）加热。

A、非接触式

B、开启式

C、封闭式

D、密封式