A steady increase in the sale of bicycles during 1999 and 2000 followed a sharp decrease i

A、A) increase and continue to increase unabated.

B、B) increase until the new steady state is reached.

C、C) decrease until the new steady state is reached.

D、D) decrease and continue to decrease unabated.

A．point B．appoint C．disappoint D．point out

A、increase the steady state error

B、slow the response

C、attenuate the amplitude of vibration

D、increase the natural frequency

A．It has come to expect the steady increas

E．．．

B．．．．new developments in science and technology have brought to continu

E．．．

C．．．．new developments in science and technology have brought．．．

D．It has come to expect the steady increase in the standard of living．．．

听力原文：What is the acceleration？

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A．A kind of motion.

B．A steady speed.

C．The motion of a plane.

D．An increase in speed.

A.decrease dramaticlly

B.increase dramaticaly

C.remain steady