【单选题】In the writer's view, the more new goods there are,______.
A.
the less pollution we have
B.
the harder pollution can be done away with
C.
the more pollution there will be
D.
the more easily pollution can be controlled
【单选题】In the distributor-less ignition system, the spark timing is controlled by ________.
【单选题】以下哪个发明主体属于可授予实用新型专利权的主体?
【单选题】在函数说明时,下列哪一项是不必要的?( )
【单选题】点 A 的 X 坐标,反映了 A 点到()的距离。