Which detail from “Thomas Edison: The Master of Improvement” explains why Swan’s lightbulb failed to be successful? “He developed and demonstrated the first small lightbulb in 1878.”
“Its glow was produced by electricity passing through a filament, or tiny piece of material.”
“The inside of the glass bulb was a vacuum. In other words, it was oxygen-free.”
“[The] bulb did not glow for long, however. It produced light for only thirteen hours.

Which sentence uses the verbs correctly?

As sentenças a seguir trazem a mesma situação: a entrada de animais. leia: i – é proibido entrada de animais. ii – é proibida a entrada de animais. iii – é proibida entrada de animais. assinale a alternativa correta em que indica o uso correto do artigo nas sentenças: escolha uma: a. as sentenças i, ii e iii estão corretas. b. as sentenças i e iii estão corretas. c. as sentenças i e ii estão corretas. d. somente a sentença i está correta. e. as sentenças ii e iii estão corretas.

It’s ok to use materials without referencing them as long as they’re paraphrased in your own words. a. false b. true c. sometimes d. depends