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radioactivity

[ˌreɪdɪəʊækˈtɪvətɪ]
noun

radiactividad f

similar words

radioactivity

-

radio-controlled

-

-

-

-

-

-

radio frequency

-

-

-

radioactive waste

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French

German

Italian

Complétez la séquence avec la proposition qui convient.

“Smoking is forbidden” means you … smoke.
- need to
- needn't
- mustn't