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Choose the connector that best completes the sentence:
"He studied hard for the exam; ___, he did not achieve the expected results."
Complete the sentence with the correct verb form:
"She ___ for hours, which explains why she is so tired."
Considering the appropriate use of relative pronouns and their functions in defining clauses, choose the correct sentence:
Read the sentence below:
"People believe that the company is expanding rapidly due to recent investments."
Considering formal written English and appropriate use of the passive voice, choose the alternative that correctly rewrites the sentence:
Read the text:
"Many educators argue that integrating technology into the classroom can significantly enhance students’ learning experiences. However, others claim that excessive reliance on digital tools may reduce critical thinking skills."
The word “enhance” in the text is closest in meaning to:
"To ensure optimal ionization of biomolecules, use a capillary voltage between 3.5 and 4.5kV. The nebulizer gas should be set at 50 psi, and the drying gas should be heated to 350°C. Maintain a source temperature of 120°C. For larger molecules, increasing the capillary voltage to 5kV may improve ionization efficiency."
Com base nas informações fornecidas, a recomendação sobre o ajuste da tensão do capilar é:
"For optimal detection of compounds absorbing in the 200 - 300 nm range, set the wavelength between 220 - 230 nm . For compounds with stronger absorbance above 300 nm, use wavelengths around 280 - 290 nm. Adjust the wavelength to maximize the signal intensity while avoiding excessive noise."
Com base no trecho citado, a instrução CORRETA para o ajuste do comprimento de onda em CLAE é: