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【单选题】
如图所示发现电流表的示数为0.5A，此时通过R1的电流为I1，通过R2的电流为I2，则( )A.
2015年贵州黔西南州中考物理真题及答案,贵州省黔西南州2015年中考物理试卷 如图所示，电源电压保持不变，只闭合开关S时，电流表的示数为0.2A，若再闭合开关S1，发现电流表的示数为0.5A，此时通过R1的电流为I1，通过R2的电流为I2，则 A.I1：I2=2：5
B.
I1：I2=3：5
C.
R1：R2=3：2
D.
R1：R2=2：3
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400IU
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A.
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400IU～800IU
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D.
5000IU～10000IU
E.
10000IU～20000IU
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A.
be large producers of applesauce
B.
be large producers of apples
C.
have the longest history in apple production
D.
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E.
2000IU
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eternal
B.
successive
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consecutive
D.
insistent
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200IU
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C.
1000IU
D.
1500IU
E.
2000IU
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A.
had arrived in; had gone
B.
arrived in; has been
C.
got to; had gone
D.
had got to; had been
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