If you can't __ your shyness,  you'll never pass the English oral test.

A．take off

B．get over

C．break off

D．give away

充气搅拌式浮选机与一般机械式浮选机比较，具有（）等特点。

A、充气量易于单独调节

B、机械搅拌器磨损小

C、选别指标较好

D、功率消耗低