某企业某会计期间期初资产总额100000元，当期期末负债总额比期初减少30000元，

手性药物的对映异构体之间可能

A．具有等同的药理活性和强度

B．产生相同的药理活性，但强弱不同

C．一个有活性，一个没有活性

D．产生相反的活性

E．产生不同类型的药理活性

下图为世界某区域示意图及该区域甲、乙、丙、丁四城市气候资料图。读图 完成下列各题。

小题1:甲、乙、丙、丁四城市的气候对应正确的是

A．甲—①乙—④丙—③丁—②

B．甲—③乙—①丙—②丁—④

C．甲—④乙—②丙—①丁—③

D．甲—②乙—①丙—③丁—④小题2:造成甲、丙两地冬季降水差异较大的主要原因是

A．风带、气压带的季节移动

B．地形、海陆位置的差异

C．附近海域洋流性质差异

D．海陆热力性质的差异小题3:②所示城市夏季气温较低的主要影响因素是

A．洋流

B．地形

C．海陆位置

D．太阳辐射

Against the supposition that forest fires in Alaska, Canada and Siberia warm the climate, scientists have discovered that cooling may occur in areas where burnt trees allow more snow to mirror more sunlight into space.

This finding suggests that taking steps to prevent northern forest fires to limit the release of greenhouse gases may warm the climate in northern regions. Usually large fires destroyed forests in these areas over the past decade. Scientists predict that with climate warming, fires may occur more frequently over the next several centuries as a result of a longer fire season. Sunlight taken in by the earth tends to cause warming, while heat mirrored back into space tends to cause cooling.

This is the first study to analyze all aspects of how northern fires influence climate. Earlier studies by other scientists have suggested that fire in northern regions speed up climate warming because greenhouse gases from burning trees and plants are released into the atmosphere and thus trap heat.

Scientists found that right after the fire, large amounts of greenhouse gases entered the atmosphere and caused warming. Ozone（臭氧） levels increased, and ash from the fire fell on far-off sea ice, darkening the surface and causing more radiation from the sun to be taken in. The following spring, however, the land within the area of the fire was brighter than before the fire, because fewer trees covered the ground. Snow on the ground mirrored more sunlight back into space, leading to cooling.

“We need to find out all possible ways to reduce the growth of greenhouse gases in the atmosphere.” Scientists tracked the change in the amount of radiation entering and leaving the climate system as a result of the fire, and found a measurement closely related to the global air temperature. Typically, fire in northern regions occurs in the same area every 80 to 150 years. Scientists, however, found that when fire occurs more frequently, more radiation is lost from the earth and cooling results. Specifically, they determined when fire returns 20 years earlier than predicted, 0.5 watts per square meter of area burned are soaked up by the earth from greenhouse gases, but 0.9 watts per square meter will be sent back into space. The net effect is cooling. Watts are used to measure the rate at which energy is gained or lost from the earth.

小题1:According to the new findings, taking steps to prevent northern forest fires may __________.

A．result in a warming climate

B．cause the forest fires to occur more frequently

C．lead to a longer fire season

D．protect the forests and the environment there小题2:The following are all the immediate effects after a forest fire EXCEPT __________.

A．large amounts of greenhouse gases enter the atmosphere

B．the levels of ozone which is a type of oxygen increase

C．snow on the ground mirrors more sunlight back into space

D．ashes from the fire fall on the ice surface and take in more radiation from the sun小题3:Earlier studies about northern forest fires __________.

A．analyze all aspects of how northern fires influence climate

B．indicate that forest fires will pollute the atmosphere

C．suggest that people should take measures to protect environment

D．suggest that the fires will speed up climate warming小题4:The underlined phrase “soak up” in the last paragraph most probably means __________.

A．released

B．absorbed

C．created

D．distributed小题5:From the passage we can draw a conclusion that forest fires in Alaska, Canada and Siberia may __________.

A．warm the climate as the supposition goes

B．allow more snow to reflect more sunlight into space and thus cool the climate

C．destroy large areas of forests and pollute the far-off sea ice

D．help to gain more energy rather than release more energy

民事法律关系是典型的( )。

A．平权型法律关系

B．绝对法律关系

C．相对法律关系

D．隶属型法律关系

以下关于烧伤的处理中，不适宜的是（）

A．保护烧伤区，防止或清除外源性感染

B．积极处理创面，促进尽早愈合

C．康复治疗

D．治疗局部和全身感染

E．尽早输血