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答案:
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1.5(n=1,2
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2.已知A、(1,2)B、[1,2]C、[1,2)D、(1,2]
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3.1,2/3,5/9,(),7/15,4/9
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4.Cam ba nghìn một cân, rất(), tôi muốn mua 5 cân.
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5.抛物线y=2x2经过点M(1,2)
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6.Bm=3.n=4A、m=5,n=1B、m=4.=3
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7.【填空题】5 + 5 + 5 + 5 + 5 + 5 + 5 =( )×( )
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8.Calculate the wavelength (in nm) of a photon emitted by a hydrogen atom when its electron drops from the n
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9.(5 5 5 5=20分)
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10.5^2 5^3=5^5