Nguyên tố nào có nguyên tử khối là 32 đvC?

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Một số câu hỏi khác có thể bạn quan tâm.

• Choose the best answer for the following sentence:

  Sun-Young avoids ________________ underwear at the thrift store.

• Choose the best answer for the following sentence:

  The girls agreed _____________ the cake equally. 

• Find a mistake in the four underlined parts of the sentence and correct it:

  A wedding in a Greek village is really worth to be seen.

• Find a mistake in the four underlined parts of the sentence and correct it:

  I closed the door as quiet as I could.

• Find a mistake in the four underlined parts of the sentence and correct it:

  He started his talk with an explanation on the difference among accent and dialect.

• Choose the word that has the underlined part pronounced differently from the rest: 

  stay                     manage                      may                        play

• Choose the word whose stress is on the second syllable:

  college                 student                   member                       enrich

• Choose the word whose stress is on the second syllable:

  voluntary                  hospital                     victory                        sufficient

• Choose the best answer for the following sentence:

  People use ___________ to run machines, heat and cool their home.
  
  

• Choose the best answer for the following sentence:

  Substance that makes the air, water and soil dangerously dirty is called ____________.