交流发电机经整流后输出一个( )电压
A. 交流
B. 脉动直.流电压
C. 稳恒的直流电压
New measures have been introduced to traffic congestion(拥堵) in the city.
A. relieve
B. free
C. figure out
D. ease
Although she began as her brother’s research assistant, she went on to pursue her own studies.
A. dependent
B. independent
C. independence
D. dependence
The optimistic view is that college student is climbing and will continue to do so, only at a slower-than-anticipated rate.
A. register
B. enrollment
C. numbers
D. rate