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【单选题】
Smoking Since 1939, numerous studies have been conducted to determine whether smoking is a health hazard. The trend of the evidence has been consistent and indicates that there is a serious health risk. Research teams have conducted studies that show beyond all reasonable doubt that tobacco smoking is associated with a shortened life expectancy. Cigarette smoking is believed by most research workers, in this field to be an important factor in the development of cancer of the lungs and cancer of the throat and is believed to be related to cancer of some other organs of the body. Male cigarette smokers have a higher death rate from heart disease than non-smoking males. Female smokers are thought to be less affected because they do not breathe in the smoke so deeply. Apart from statistics, it might be helpful to look at what smoking tobacco does to the human body. Smoke is a mixture of gases, vaporized chemicals, minute particles of ash and other solids. There is also nicotine, which is powerful poison, and black tar. As smoke is breathed in, all those components form. deposits on the membranes of the lungs. One point of concentration is where the air tube and bronchus divides. Most lung cancer begins at this point. Filters and low tar tobacco are claimed to make smoking to some extent safer, but they can only slighfiy reduce, not eliminate the hazards. It is easy to determine whether smoking is hazardous.
A.
Right
B.
Wrong
C.
Not mentioned
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【简答题】(+9)-(+8)-(-2)-(-10) 2、 3、 4、 5、
【简答题】F. Brazil 1. How long _____________________________________? All night. 2.Why________________________________________? They came to study and look for work.
【判断题】所谓B2C电子商务,也称为商家与个人用户或商业机构与消费者之间的电子商务。
A.
正确
B.
错误
【多选题】下列关于空气处理设备的运输和吊装说法正确的是()。
A.
应保证设备运输通道的畅通;
B.
吊索与设备接触部位应衬垫硬质材料;
C.
设备应捆扎稳固,主要受力点应高于设备重心;
D.
应复核设备重量与运输通道的结构承载能力。
【简答题】比一比。 10-2○9-2 4+4○2+6 8+7○9+8 10-6+5○2+4+4 6+8○9+5 18-10-3○15-5-4
【单选题】企业效率是指( )。
A.
企业产出与投入之比
B.
企业销售总额
C.
企业目标的达成度
D.
企业的管理水平
【判断题】所谓B2C电子商务,也称为商家与个人用户或商业机构与消费者之间的电子商务。()
A.
正确
B.
错误
【判断题】有效率是指做正确的事,中心在于高目标达成。
A.
正确
B.
错误
【单选题】According to the man, how much coffee consumed worldwide is produced in Brazil?
A.
One six.
B.
One third.
C.
Two thirds.
D.
Three fifths.
【简答题】选择合适的选项填空补全对话。 A. how   B. how old   C. how far  D. how many   E. how much   F. what colour 1. — ____________ is his hair?  — It is gray. 2. — ____________ is it from Beijing to Guangzhou?  — It's abo...
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