Mites are very small creatures that are about ...
A. 3 millimetres long.
B. a third of a millimetre long.
C. 0.03 millimetres long.
查看答案
Mites eat ...
A. dead skin.
B. your eyelashes.
C. tiny insects.
Only one tenth of the cells in your body are really you. The rest are ____.
An experiment found that animals that did not have bacteria ____or had to have a special diet.
There are ____octillion cells in the human body.
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