题目内容

1 nm = _______ ym.

A. 10^12
B. 10^13
C. 10^14
D. 10^15

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1zm=_______nm.

A. 10^-10
B. 10^-11
C. 10^-12
D. 10^12

1 am = _______ nm.

A. 10^-6
B. 10^-9
C. 10^-12
D. 10^-15

1 nm = _______ dm.

A. 10^-6
B. 10^-7
C. 10^-8
D. 10^-9

'_________' is defined as "The length of the path travelled by light in vacuum during a time interval of 1⁄299,792,458 seconds".

A. 1 kilogram
B. 1 meter
C. 1 centimeter
D. 1 mile