Mei Li:
Which English bridge was the world's longest suspension bridge from 1981 to 1998??
Shuai Zheng:
humber bridge
Mei Li:
'The Sarah Jane Adventures' was a spin-off from which t.v. programme??
Shuai Zheng:
doctor who
Mei Li:
"""The sum of the squares of the lengths of the four sides of a parallelogram equals the sum of the squares of the lengths of the two diagonals"" is known as what?"?
Shuai Zheng:
parallelogram law