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【简答题】
对于漫反射式光电开关,粗糙表面反射回的光线强度必将 (填写大于、小于、等于)光滑表面反射回的光线强度。
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【单选题】液体对光滑表面的润湿常用接触角来量度,下面的说法正确的是( )
A.
θ=0°时,液体对固体完全不润湿
B.
θ=180°时,液体对固体完全润湿
C.
θ=90°时,是润湿与不润湿的分界线
D.
0°
【单选题】In the wake of 11 September, Visionics, a leading manufacturer, issued a fact sheet explaining how its technology could enhance airport security. They called it "protecting civilization from the faces...
A.
any way, the face-recognition technology is good enough to frighten the terrorists
B.
the industry will have to recognize the real situation and work hard to improve the technology
C.
all the claims are premature
D.
we must not expect too much
【单选题】In the wake of 11 September, Visionics, a leading manufacturer, issued a fact sheet explaining how its technology could enhance airport security. They called it "protecting civilization from the faces...
A.
the suce of the software is not smooth
B.
there is a series of face-recognition software products
C.
the software turns out to be inefficient
D.
the software is not durable
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【单选题】液体对光滑表面的润湿常用接触角来量度,下面的说法正确的是( )
A.
θ=0°时,液体对固体完全不润湿
B.
θ=180°时,液体对固体完全润湿
C.
θ=90°时,是润湿与不润湿的分界线
D.
0°
【单选题】In the wake of 11 September, Visionics, a leading manufacturer, issued a fact sheet explaining how its technology could enhance airport security. They called it "protecting civilization from the faces...
A.
any way, the face-recognition technology is good enough to frighten the terrorists
B.
the industry will have to recognize the real situation and work hard to improve the technology
C.
all the claims are premature
D.
we must not expect too much
【单选题】In the wake of 11 September, Visionics, a leading manufacturer, issued a fact sheet explaining how its technology could enhance airport security. They called it "protecting civilization from the faces...
A.
the suce of the software is not smooth
B.
there is a series of face-recognition software products
C.
the software turns out to be inefficient
D.
the software is not durable
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