收尘极系统的功能是_____________,并在______作用下使收尘极板表面附着的粉尘成片状脱离板面,落入灰斗中,达到除尘的目的。
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A:INSERT INTO Teacher(编号,职称)VALUES("070041","助教")
B:INSERT INTO Teacher("070041","助教")VALUES(编号,职称)
C:INSERT INTO VALUES(编号,职称)Teacher("070041","助教")
D:INSERT INTO VALUES("070041","助教")Teacher(编号,职称