下列有关心肌挫伤，哪项叙述不正确（） A.低血压 B.心脏传导不正常 C.心脏超声可

远方跳闸保护是一种直接传输跳闸命令的保护，（）动作后，通过发出远方跳闸信号，直接将对侧断路器跳开。

A.高压电抗器保护

B.过电压保护

C.断路器失灵保护

D.后备保护

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 had suggested that fires in northern regions sped up climate warming because greenhouse gases from burning trees and plants were released into the atmosphere and thus trapped 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 ashes from the fire fell on far­off 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 said.They 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 more forest fires

C．lead to a longer fire season

D．protect the forests there小题2:The following are 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 and darken the surface小题3:Earlier studies about northern forest fires________.

A．had analyzed all aspects of how northern fires influenced climate

B．had indicated that forest fires would pollute the atmosphere

C．had suggested that people should take measures to protect environment

D．had suggested that the fires would speed up climate warming小题4:We can infer that forest fires in Alaska，Canada and Siberia may________.

A．warm the climate as the supposition goes

B．cool the climate by reflecting more sunlight into atmosphere

C．make more space for the growth of young trees

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

关于闭合性气胸的叙述不正确的是（）

A.伤侧胸膜腔内压力升高，但仍低于大气压

B.进气少、肺萎陷在50%以下者，常无明显症状，可自行吸收，不需特殊治疗

C.大量进气则由纵隔推向健侧，患者胸闷、气促，伤侧叩诊鼓音，听诊呼吸音减弱或消失

D.X线检查显示伤侧肺萎陷和胸膜腔积气，纵隔向健侧移位

E.重者需于伤侧锁骨中线第2肋间穿刺抽尽积气，或行胸腔闭式引流

营业厅服务效率总的要求是：“（）、准确、（）、优质、（）”。

王某，男，47岁。患胃疾多年，呕吐反复发作，时作干呕，口燥咽干，似饥而不欲食，舌红苔少，脉细数。治法宜选用：

A．疏肝和胃，降逆止呕

B．滋养胃阴，降逆止呕

C．温中健脾，和胃降逆

D．消食导滞，和胃降逆

E．解散表邪，降逆止呕