Cho các oxit sau: NO₂, P₂O₅, CO₂, SO₂, SO₃, CrO₃, Cl₂O₇. Số oxit axit ở trên là:

A. 4

B. 7

C. 5

D. 6

Hí!

King Henry, _______ was Elizabeth I, led England into the Age of Empire.

A. daughter                                       

B. whom daughter

C. which daughter                                      

D. whose daughter