题目内容

1angström=_____ meters.

A. 10^-6
B. 10^-8
C. 10^-10
D. 10^-12

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1 xu of X ray = _______picometer.

A. 0.01
B. 0.1
C. 1
D. 10

IncommonImperialandUScustomaryunitsoflength,1point(p)=__________mm.

A. 127/3,600
B. 127/1,800
C. 127/360
D. 127/180

IncommonImperialandUScustomaryunitsoflength,1pica(P/, = 12 p)=_________mm.

A. 127/300(42.33)
B. 127/150(21.17)
C. 127/30(4.233)
D. 127/15(8.466)

IncommonImperialandUScustomaryunitsoflength,1inch(in, = 6 P/)=_______mm.

A. 20.4
B. 25.4
C. 45.4
D. 65.4