unknown
unknown
Exactly which bacteria cause the ______ is still unknown.
Exactly which bacteria cause the ______ is still unknown.
_________ we will go for an outing tomorrow remains unknown.
_________ we will go for an outing tomorrow remains unknown.
The fire was _____ by the firefighters, but the cause of the fire was still unknown.
The fire was _____ by the firefighters, but the cause of the fire was still unknown.
Which of the following descriptions of gray numbers is correct? A: A grey number is a kind of uncertain number which exact value and the range are unknown. B: A grey number is a kind of uncertain number which exact value is unknown but the range of the number is known. C: The value range of the gray number can only be an interval. D: Black and white numbers are not gray numbers.
Which of the following descriptions of gray numbers is correct? A: A grey number is a kind of uncertain number which exact value and the range are unknown. B: A grey number is a kind of uncertain number which exact value is unknown but the range of the number is known. C: The value range of the gray number can only be an interval. D: Black and white numbers are not gray numbers.
Why John told him this news is still unknown.
Why John told him this news is still unknown.
For most people, the __________ part of stage fright is fear of the unknown.
For most people, the __________ part of stage fright is fear of the unknown.
_____ is unknown to us all.
_____ is unknown to us all.
What is an UFO? A: It is an Unknown Flying Object. B: It is an Unidentified Flying Object. C: It is an Unknown Flowing Object. D: It is an Unidentified Flowing Object.
What is an UFO? A: It is an Unknown Flying Object. B: It is an Unidentified Flying Object. C: It is an Unknown Flowing Object. D: It is an Unidentified Flowing Object.
He bowed in homage to the Unknown Soldier.
He bowed in homage to the Unknown Soldier.