How many milliliters are there in a litre?
A. 1000 millilitres
B. 100 millilitres
C. 10 millilitres
D. 1 millilitres » Read More…
The most commonly used semiconductor is ________?
A. Germanium
B. Silicon
C. Carbon
D. Sulphur » Read More…
Which scientist discovered the radioactive element radium?
A. Isaac Newton
B. Albert Einstein
C. Benjamin Franklin
D. Marie Curie
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