A．It can increase production by 4.5 percent in factories at least.B．It is sometimes very boring to the workers.C．It can possibly give people better feeling and influence their attitudes.D．It is always faster than any other music.
A．It can increase production by 4.5 percent in factories at least.
B．It is sometimes very boring to the workers.
C．It can possibly give people better feeling and influence their attitudes.
D．It is always faster than any other music.