Science Discovery

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8
9
2
5
3
1
6
7
4

横向

1

Force that attracts objects together

4

Unit of power

5

Amplified beam of light

7

Compound containing oxygen

9

Basic unit of life

纵向

2

Mass per unit volume

3

Path of a planet around the sun

6

Unit of force

8

Naturally occurring inorganic solid