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【多选题】
下列概念正确的有（）A.
优产度主要指农产品等地方物产的品质优劣程度，绿色、有机农产品占农产品总量的比重，是衡量一地优产度高低的一个重要指标。
B.
空气洁净度即空气含尘 ( 包括微生物 ) 量的大小程度。
C.
环境噪声强度即环境中振幅和频率完全无规律的声音的大小程度。
D.
绿化度是指森林面积占土地面积比重，反映一个地区森林资源丰富程度及绿化程度。
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举一反三
【单选题】如果说新世纪的那一场阿富汗战争则预示着信息化战争得到了进一步的发展，那么2003年3月20日打响的()战争则让我们看到了信息化战争的雏形。
A.
海湾
B.
科索沃
C.
伊拉克
D.
阿富汗
【单选题】Some recent historians have argued that life in the British colonies in America from approximately 1763 to 1789 was marked by internal conflicts among colonists. Inheritors of some of the viewpoints o...
A.
potentially verifiable
B.
partially justified
C.
logically contradictory
D.
ingenious but flawed
【单选题】Some recent historians have argued that life in the British colonies in America from approximately 1763 to 1789 was marked by internal conflicts among colonists. Inheritors of some of the viewpoints o...
A.
potentially verifiable
B.
partially justified
C.
logically contradictory
D.
ingenious but flawed
【单选题】Some recent historians have argued that life in the British colonies in America from approximately 1763 to 1789 was marked by internal conflicts among colonists. Inheritors of some of the viewpoints o...
A.
potentially verifiable
B.
partially justified
C.
logically contradictory
D.
ingenious but flawed
【单选题】Itwasnotuntil1920_______regularradiobroadcastsbegan
A.
while
B.
Which
C.
that
D.
when
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