How the COVID-19 vaccines were created so quickly| 5/2截止

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The amount of time required to _____ a word file to pdf format is short.

• modify
• describe

• copy

• encode

Fresh fruit and vegetables are an essential _____ of a healthy diet.

• ingredient
• component

• resource

• source

Giving up our car has radically ____ our lifestyle.

• weakened

• enhanced
• altered

• transformed

Which does the "m" in the "mRNA" mean?

• messenger
• magnificent
• microscopic
• mitochondrial

What is the temperature of the vaccine to be stored?

• 20 to 25 degrees Celsius
• -20 to 0 degrees Celsius

• 10 to 100 degrees Celsius

• -20 to -80 degrees Celsius