Which of the following is not an essential factor of a block?() A: Previous block header hash B: Time stamp C: Index value D: Cryptographic hash
Which of the following is not an essential factor of a block?() A: Previous block header hash B: Time stamp C: Index value D: Cryptographic hash
stamp
stamp
2. At one time people thought of some pretty o________ ways to make sure the stamp couldn’t be used again. (--unusual, different from what most people expect )
2. At one time people thought of some pretty o________ ways to make sure the stamp couldn’t be used again. (--unusual, different from what most people expect )
date stamp
date stamp
stamp design 是什么意思？
stamp design 是什么意思？
stamp的复数是____。
stamp的复数是____。
I need one more stamp before my collection ( ). I need one more stamp before my collection ( ).
I need one more stamp before my collection ( ). I need one more stamp before my collection ( ).
Where should a stamp be placed on the envelope?
Where should a stamp be placed on the envelope?
Which of the following is not included in the Stamp Act to tax on?
Which of the following is not included in the Stamp Act to tax on?
The weekly radio program is on ______. A: many people produce designs for stamps B: few people are interested in stamp design C: people will never agree about stamp design
The weekly radio program is on ______. A: many people produce designs for stamps B: few people are interested in stamp design C: people will never agree about stamp design