39. She told me that if she was not _______within

39. She told me that if she was not _______within the next two years he was goin

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14. Some students are enthusiastic for positions i

14. Some students are enthusiastic for positions in student organizations probab

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电压表A内阻为20000,电压表B内阻为10000,量程都是15V,当它们串联在15V的电源上时,电

电压表A内阻为20000,电压表B内阻为10000,量程都是15V,当它们串联在15V的电源上时,电压表B的读数是()。 A.15V B.10V; C.5

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简支梁受力如图所示,梁上截面3-3处的剪力是( )

简支梁受力如图所示,梁上截面3-3处的剪力是( )

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