Mei Li:
What type of crystal is used to keep time in most modern clocks and watches??
Shuai Zheng:
quartz
Mei Li:
The salts of which poisonous acid are found in rhubarb leaves??
Shuai Zheng:
oxalic acid
Mei Li:
"""The Smoke that Thunders"" is the local name for which Geographical feature?"?
Shuai Zheng:
victoria falls