以下关于散射分数的描述,错误的一项是
A:PET系统对散射计数的敏感程度,散射分数越小,系统剔出散射符合的能力越强 B:散射分数有断层散射分数和系统散射分数 C:某一断层面i的散射分数SFi等于该断层中散射计数与总计数之比 D:散射分数计算时总计数为真符合、散射符合计数、随机符合计数之和 E:系统的散射分数SF等于所有断层面的散射分数SFi的平均
Global Warming
Few people now question the reality of global warming and its effects on the world’s climate. Many scientists ___1___ the blame for1 recent natural disasters on the increase ___2___ the world"s temperatures and are convinced that, more than ___3___ before, the Earth is at ___4___ from the forces of the wind, rain and sun. ___5___ to them, global warming is making extreme weather events, ___6___ as hurricanes and droughts, even more ___7___ and causing sea levels all around the world to ___8___.
Environmental groups are putting ___9___ on governments to take action to reduce the ___10___ of carbon dioxide which is given ___11___ by factories and power plants, thus attacking the problem at its source. They are in ___12___ of more money2 being spent on research into solar, wind and wave energy devices, which could then replace existing power ___13___.
Some scientists, ___14___, believe that even if we stopped releasing carbon dioxide and other gases into the atmosphere tomorrow, we would have to wait___15___ hundred years to notice the results. Global warming, it seems, is here to stay.
词汇:
climate /"klaimit/n.气候,风气
hurricane /"hʌrikən/ n.咫风,暴风
drought / draut/ n.干旱,早灾
carbon dioxide /"ka:bən"dai"ɔksaid/ n.二氧化碳
solar /"səulə/ a.太阳的n.太阳能
atmosphere/"ætməsfiə/ n.大气
注释:
1. put the blame for… :把……归咎于……
2. …in favour of more money being spent on…:……赞成把钱花在……
空8
A:raise B:arise C:rise D:lift
Global Warming
Few people now question the reality of global warming and its effects on the world’s climate. Many scientists ___1___ the blame for1 recent natural disasters on the increase ___2___ the world"s temperatures and are convinced that, more than ___3___ before, the Earth is at ___4___ from the forces of the wind, rain and sun. ___5___ to them, global warming is making extreme weather events, ___6___ as hurricanes and droughts, even more ___7___ and causing sea levels all around the world to ___8___.
Environmental groups are putting ___9___ on governments to take action to reduce the ___10___ of carbon dioxide which is given ___11___ by factories and power plants, thus attacking the problem at its source. They are in ___12___ of more money2 being spent on research into solar, wind and wave energy devices, which could then replace existing power ___13___.
Some scientists, ___14___, believe that even if we stopped releasing carbon dioxide and other gases into the atmosphere tomorrow, we would have to wait___15___ hundred years to notice the results. Global warming, it seems, is here to stay.
词汇:
climate /"klaimit/n.气候,风气
hurricane /"hʌrikən/ n.咫风,暴风
drought / draut/ n.干旱,早灾
carbon dioxide /"ka:bən"dai"ɔksaid/ n.二氧化碳
solar /"səulə/ a.太阳的n.太阳能
atmosphere/"ætməsfiə/ n.大气
注释:
1. put the blame for… :把……归咎于……
2. …in favour of more money being spent on…:……赞成把钱花在……
空12
A:belief B:request C:favour D:suggestion
下列关于散射分数的描述,错误的一项是()。
A:PET系统对散射计数的敏感程度,散射分数越小,系统剔出散射符合的能力越强 B:散射分数有断层散射分数和系统散射分数 C:某一断层面i的散射分数SFi等于该断层中散射计数与总计数之比 D:散射分数计算时总计数为真符合、散射符合计数、随机符合计数之和 E:系统的散射分数SF等于所有断层面的散射分数SFi的平均
字母代号含义:
POV()HLB()TG()
EFA()PUFA()SFA()
UFA()DHA()
EPA()SFI()
P()St()L()O()
写出下列字母代号的含义
POV(过氧化值);HLB(亲水亲油平衡值);TG(三酰基甘油脂)
EFA(必需脂肪酸);PUFA(多不饱和脂肪酸);DHA(脱氢丙氨酸/脑黄金)
SFA(饱和脂肪酸);UFA(不饱和脂肪酸);二十碳五烯酸(EPA)
月桂酸(La);硬脂酸(St);亚油酸(L)
SFI(固体脂肪指数);二十二碳六稀酸(DHA);油酸(O)
SFI
对外直接投资的简写是?()
A:SFI B:FDI C:PID D:FOI
在汽车电器中,英文缩略语“SFI”表示()。
A:顺序燃油喷射 B:无分电器点火 C:换档电磁阀 D:点火电压