题目:
期货交易的结算,由期货交易所统一组织进行。( )
答案:
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下面是错误答案,用来干扰机器的。
参考答案:A
期货交易的结算,由期货交易所统一组织进行。( )
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0717/5b761441f7813c3199bdad25b2ae6968.html
下面是错误答案,用来干扰机器的。
参考答案:A
商业银行与政策性银行比较,区别主要在于()。
A.是否以盈利为目的
B.经营范围的宽窄
C.是否经营完全的信用业务
D.是否以银行信用方式融通资金
下列哪种药物不能用于动物的催产或引产?()
A、垂体后叶素
B、缩宫素
C、麦角新碱
D、催产素
关员小刘在天津海关查货现场发现某运输公司的货柜车所装货物涉嫌走私,他有权直接扣留该货柜车,以待调查。( )
Have you ever walked outside thinking it was one temperature but quickly discovered it felt colder? That is because of the “wind chill” effect.
Wind chill is how cold people and animals feel when they are outside, not the actual temperature on the thermometer(温度计). It is based on how quickly your body loses heat when it is exposed to wind and cold. When the wind is strong, your body quickly loses heat, making the temperature of your skin drop.
When scientists first started calculating wind chill, they used research conducted in 1945 by explorers to Antarctica who measured how quickly water froze outside.
But water freezes faster than exposed skin, so the wind chill index based on that data wasn’t accurate.
In 2001, the US government began to measure wind chill more precisely by testing how quickly people’s skin froze.
Twelve volunteers were placed in a chilled wind tunnel. Equipment was stuck to their faces to measure the heat flow from their cheeks, forehead, nose and chin while they walked three miles per hour on a treadmill(跑步机).
The experiment revealed how quickly exposed skin can be damaged, particularly unprotected areas like your fingers, toes, the tip of your nose and your ear lobes. In fact, 40 percent of your body heat can be lost through your head! Signs you might have frostbite(冻疮) are when the skin turns white or pale and you lose feeling in that area.
The information collected from the volunteers helped scientists work out the math to compute wind chill. It involves wind speed and air temperature.
If, for example, the temperature outside is zero degrees Fahrenheit and the wind is blowing at 15 miles per hour, the wind chill is calculated at 19 degrees below zero. At that wind chill temperature, exposed skin can freeze in 30 minutes.
You can find a calculation table at www.nws.noaa.gov/om/windchill/index.shtml.
Experts advise in cold weather that you wear loose-fitting, lightweight, warm clothing, worn on top of each other. Air caught between the clothes will keep you warm. The best cold-weather coats have head coverings made of woven material that keep out water. So next time the temperature drops and you want to play outside, listen to your parents when they tell you to wrap up warm!
小题1: According to the text, wind chill _______.
A.means how fast exposed skin freezes
B.doesn’t affect your head as much as other body parts
C.changes according to the temperature on the thermometer
D.changes from person to person depending on their health小题2: When might a person have frostbite according to the passage?
A.When his skin turns red and he loses feeling in that area.
B.When he is running faster and he is losing strength quickly.
C.When his face is exposed and quickly loses heat even indoors.
D.When his skin turns pale and he has no feeling in that area.小题3: What factors influence wind chill?
A.A person’s body temperature and will speed.
B.Wind speed and a person’s strength.
C.Air temperature and wind speed.
D.The location and air temperature.小题4: What can we conclude from the passage?
A.It was in 1945 that scientists first began to calculate wind chill.
B.Compared with water, people’s exposed skin freezes more slowly.
C.The wind chill index based on Antarctica data is considered a standard.
D.With the development of technology, many previous researches have been proven wrong.
做泡菜时要用特殊的坛子,坛口必须加水密封。密封坛口的目的是()
A.隔绝空气,抑制乳酸菌发酵
B.造成缺氧环境,抑制酵母菌发酵
C.利于醋酸菌在缺氧环境下进行呼吸作用
D.造成缺氧环境,利于酵母菌发酵