New Zealand gained its independence in
A. 1840.
B. 1907.
C. 1931
D. 1947
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The official language spoken in Canada is
A. English and Spanish.
B. French and Spanish.
C. English and French.
D. Spanish and Dutch.
As the chief center of the American War of Independence,______was called "birthplace of America".
A. New York
B. New England
C. New Jersey
D. Washington D.C.
软膏剂中加入硅酮起什么作用()
A. 润湿剂
B. 溶剂
C. 防腐剂
D. 表面活性剂
E. 防水剂
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