单面冻融法(或称盐冻法)适用于测定混凝土试件在大气环境中且与盐接触的条件下,以能够经

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问题:

单面冻融法(或称盐冻法)适用于测定混凝土试件在大气环境中且与盐接触的条件下,以能够经受的冻融循环次数或者()或()来表示的混凝土抗冻性能。

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What should you take in with you when you take an exam? Pen, pencil, eraser, ruler…, and don’t forget a bottle of water!

According to a study at the British Psychological ( 心理学的) Society Annual Conference held in London, students who bring water into exams may improve their grades by up to 10 percent.

Scientists at the University of East London and the University of Westminster, UK, did a study on 447 students. The students were studying for different degrees (学历) at the University of East London. Only 25 percent of them entered the exam hall with something to drink.

Scientists then compared their exam results with their normal schoolwork grades. They found that all those who had brought drinks with them got better grades by between 2 and 10 percent.

It is unclear why drinking water improves exam results. But scientists say having enough water in our bodies and not feeling thirsty could have a helpful effect on our brains. Drinking water may also cut down on anxiety ( 焦虑), which has a bad effect on exam performances, according to Chris Pawson, PhD, of the University of East London.

“Whatever the explanation, it is clear that students should try hard to stay hydrated (含水的)with water during exams,” he said.

So next time, when you are going to have a big exam, try bringing a bottle of water with you.Who knows – it may help you pass the exam!

小题1:How much may the students improve their grades most if they bring water into exams?

A.By2%.

B.By8%.

C.By10%.

D.By25%.小题2:How many students in the study got better grades?

A.About112 students who brought drinks or water into their exams.

B.All the447 students who come from the University of East London.

C.About300 students who took part in the study.

D.About10 percent of the students who studied different subjects.小题3:The underlined phrase “cut down on” probably means _______.

A.increase

B.bring

C.reduce

D.change小题4:According to the passage, how does water help students in exams?

a. It is good for their brains.

b. It makes students smarter.

c. It helps students stay cool.

d. It helps students stay awake.

A.a b

B.a c

C.b c

D.c d小题5:Where can you probably read the article?

A.Fashion magazine.

B.Text book.

C.Travel guide.

D.Newspaper.

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四则混合运算顺序是从左到右计算.______.

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关于速度和加速度的关系,下列说法正确的是(  )

A.加速度很大,说明速度的变化一定很大

B.加速度很大,说明速度的变化率一定很大

C.只要加速度不为零,速度一定变化

D.只要加速度不为零,速度大小一定变化

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软骨肉瘤X线表现为()

A.干骺端日光放射状骨膜反应 

B.骨干葱皮样骨膜反应伴软组织肿块 

C.巨大软组织肿块内散在斑块状钙化 

D.骨旁分叶状高密度骨性肿块 

E.于骺端偏心膨胀性骨质破坏

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美国交互广告署IAB推荐的摩天大楼型广告规格是()

A.120X600像素

B.160X600像素

C.150X600像素

D.100X600像素

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