Science Review

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2
1
4
3
6
5
7

横向

1

Ball of burning gas in space

2

Natural satellite of Earth

3

Nerve cell in the brain

5

Substance with pH below 7

7

Basic unit of life

纵向

2

Tissue that contracts for movement

4

Naturally occurring inorganic solid

6

Infectious microscopic agent

Science Review - Amazing Crossword