The first vaccine developed was used to combat and fight a smallpox, a disease resulting from infection by a virus.

Câu hỏi liên quan

• Mosquitoes will accepts the malaria parasite at only one stage of the parasite’s complex  cycle.

• There are no easy ways to learn a foreign language, ______?

• Physiologically, the period of adolescence is marked by active growth, especially in the skeletal and muscular systems and incertain

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• Hardly he had entered the offic when he realized that he had forgotten wallet 

• – “ It’s high time someone tells James how objectionable he is”.

  “I wish you wouldn’t criticize James behind his back all time” 

• My mother doesn’t care how much does washing machine cost because she is going to buy it anyway.

• We chose to take a trip to the FaEast because it was advertised adventurous and intrigued

• Choose the word or phrase among A, B, Cor D that best fits the blank space :
  Time ..…….. and bond together is essential for any crew.

• None two butterflies have exactly the same design on their wings.

• I _____ the film last night because I _____ it several times before.

• The diameter of Sun is more than one hundred times greater than the Earth.

• Mark the letter A, B, C, or D to indicate the underlined part that needs correction in each of the following questions: Although its height, Mount Whitney, one of the north America’s highest mountains, is popular with hikers

• You have to study hard to keep pace in classmates.

• I try to go jogging at least four times _______ week.

• It is said that the government is about to make the go ahead to plans for the building of a new runway Londons Gatwick airport

• You needn’t do that when the maid is here, _____?

• Hardly he had got downstairs when phone stopped ringing yesterday afternoon

• Viscosity is measurement describing the relative difficulty or easy with which liquids .

• Group that conducting its meeting using parliamentary rules will encounter situations where prescribed procedures cannot be applied.

• Lightning rods are used for to direct intense electrical bursts into the ground instead of buildings and people