改变切换门限值可以相应增大或减小切换半径,达到均衡话务量的目的。
参考答案:对
—Do you know the colors of the Olympic rings?
—Yes. They're blue, yellow, black, green and red. You can find ____ one of these colors in the flags
of every country. [ ]
A. at least
B. at most
C. only
D. more than
曲轴是一个形状复杂、刚度差的零件。在车削加工时,为了减小曲轴的弯曲和扭转变形,可采用()传动或()传动方式进行加工,并尽量采用有前后刀架的机床使加工过程中产生的()互相抵消。