无菌操作应在什么环境中进行-我要搜题网

[单选题]指令寄存器的作用是().
A.A:存放下一条将要执行的指令在内存中的地址
B.B:保存现在正在执行的指令
C.C:用来识别指令的功能,分析指令
D.D:从内存中取指令和执行指令

[单选题] We are justified in _____ equal rights at worK.
A. needing
B. requiring
C. demanding
D. wanting

[填空题]大跨度大空间建筑火灾救援中，在每个区段或战斗面，应预备_，与安全员协同配合，遇有指战员被困、失联等突发情况必须立即组织开展营救。

[不定项选择题]共用题干 New research from NASA scientists suggests emissions of black soot after the way sunlight re- flects off snow.According to a computer simulation,black soot may be responsible for 25 percent of observed global warming over the past century. Soot in the higher latitudes（维度）of the Earth,where ice is more common , absorbs more of the sun's energy and warmth than an icy,white background. Dark-colored black carbon,or soot, absorbs sunlight,while lighter colored ice reflects sunlight.
Soot in areas with snow and ice may play an important role in climate change.Also,if snow and ice covered areas begin melting,the warming effect increase,as the soot becomes more con-centrated on the snow surface.“This provides a positive feedback,as glaciers and ice sheets melt, they tend to get even dirtier.”said Dr. James Hansen,a researcher at NASA's Goddard Institute for Space Studies,New York.
Hansen found soot's effect on snow albedo（反照率）,which may be contributing to trends to-ward early springs in the Northern Hemisphere,such as thinning Arctic sea ice and melting glac-iers permafrost. Soot also is believed to play a role in changes in the atmosphere above the oceans and land.
“Black carbon reduces the amount of energy reflected by snow back into space,thus heating the snow surface more than if there were no black carbon,”Hansen said. Soot's increased absorp-tion of solar energy is especially effective in warming the world's climate.“ This forcing is unusual-ly effective,causing twice as much global warming as a carbon-dioxide forcing of the same magni-tude.”Hansen noted.
Hansen cautioned,although the role of soot in altering global climate is substantial,it does not alter the fact that greenhouse gases are the primary cause of climate warming during the past century .Such gases are expected to be the largest climate forcing for the rest of the century.
The researchers found that observed warming in the Northern Hemisphere was large in the winter and spring at middle and high latitudes. These observations were coherent with the researchers' climate model situations,which showed some of the largest warming effects occurred when there were heavy snow cover and sufficient sunlight. What is the main cause of climate warming during the past century?
A.Soot.
B.Snow.
C.Greenhouse gases.
D.Wind.

[多项选择]无菌操作应在什么环境中进行A. 无菌操作室B. 无菌柜C. 根据药品D. 没有严格要求E. 根据环境

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[多项选择]无菌操作应在什么环境中进行
A. 无菌操作室
B. 无菌柜
C. 根据药品
D. 没有严格要求
E. 根据环境