A:as well
B:as long
C:as much
D:as many
请回答:
梯形ABCD中,AD∥BC,AB=CD=AD=2,∠B=60°,则下底BC的长是( )
11-6=____
6+____=11
The machine____ ____ widely used in the future
汉朝时选官的主要办法是( )