计算平均发展速度常用的方法是( )A.算术平均法 B.几何平均法 C.调和平均法 D

题型:单项选择题

问题:

计算平均发展速度常用的方法是( )

A.算术平均法

B.几何平均法

C.调和平均法

D.加权算术平均法

考点:自学考试高等教育自学考试高等教育自学考试国民经济统计概论真题2009年1月
题型:单项选择题

某压力锅结构如图所示。盖好密封锅盖,将压力阀套在出气孔上,给压力锅加热,当锅内气体压强达到一定值时,气体就把压力阀顶起。假定在压力阀被顶起时,停止加热。

假定在一次放气过程中,锅内气体对压力阀及外界做功1J,并向外界释放了2J的热量。锅内原有气体的内能如何变化变化了多少?

题型:单项选择题

The Batsquatch is described as a great winged bat. It’s reported that it lives in the shadows(阴暗处) of Mt. Saint Helens. It has purple skin, red eyes and the character is quite similar to the bat’s. Since reports tell it likes eating small animals like chickens, goats and pigs, some believe that it is actually a flying primate(灵长目动物). But researchers say that it is more closely related to the fruit bat of northern America.

Fear still fills the hearts of men, women and children of Washington. In May of 1980 during the eruption of Mount Saint Helens, the Batsquatch showed itself in the shadows of clouds from the eruption. In 1994, a local mountaineer was able to take pictures of the Batspuatch making the rumor(谣言) seem real. During this event some farm animals seemed to disappear though luckily no humans were reported missing at the time. The local mountaineer told about his meeting with the Batsquatch. When he suddenly heard a loud deep voice from the shadows, the mountaineer was knocked down. He tried to look for the creature(生物) that had made the sound. He saw a great creature with purple wings in the sky. It looked like it was about 30 feet tall.

The mountaineer kept this story a secret in fear of being laughed at by others but when new stories came in about the Batsquatch he shared his story.

The reality of the Batsquatch can no longer be ignored. It is only a creature that is trying to live. Respect! This is how we should take news such as this. Respect for a living creature instead of fear.

小题1:The rumor about the batsquatch makes people of Washington full of______

A.joy

B.surprise

C.fear

D.anger小题2: Why did people believe the rumor of the Batsquatch was real?

A.Because it was reported in the newspaper

B.Because it was seen by many local people

C.Because someone once caught one

D.Because someone took its picture小题3:When the Batsquatch appeared, the mountaineer_______.

A.heard nothing strange

B.shouted at it to frighten it away

C.was lying on the ground, relaxing

D.found it was a 30-foot-tall creature that could fly小题4: The mountaineer didn’t tell others his story because he________.

A.was afraid of being laughed at

B.was too frightened to tell others

C.couldn’t believe what he saw

D.didn’t want to make fun of others小题5: The purpose of the last paragraph is to tell readers_______.

A.the Batsquatch is being endangered

B.the Batsquatch is a dangerous creature

C.respect should be given to the Batsquatch

D.the news about the Batsquatch is real

题型:单项选择题

肺结核转归为肺硬化的主要病理基础是()

A.钙化

B.纤维化

C.干酪性肺炎

D.弥漫性小结节

E.实变

题型:单项选择题

我们公司的FA415粗纱机的锭翼与筒管旋转方向相反。

题型:单项选择题

输送皮带是利用驱动辊筒靠()带动皮带运转的。

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