【单选题】What was the first stamp like?
A.
One Penny black stamps.
B.
Two Pence blue stamps.
C.
One Penny black stamps and 'Two Pence' blue stamps.
【单选题】Who first created the proverb “A penny saved is a penny earned.”? ( )
【判断题】.传动点火系火花塞跳火时,断电触点正处于张到最大间隙。