Science Discovery

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3
2
1
5
7
4
6

横向

1

Tissue that contracts for movement

2

Force that attracts objects together

4

Center of an atom or cell

纵向

2

Precious yellow metallic element

3

Nerve cell in the brain

5

Fourth state of matter

6

Reddish electrical conductor

7

Mass per unit volume

Science Discovery - Amazing Crossword