The actual______by which coal is extracted is well worth seeing.A．conductB．processC．proced

The fuel injector pump is operated by _____ which drives the plunger up and down.A.a separ

In its simplest form. the pressure reducing valve is opened or closed by _____ which is ba

The Jungle is a novel by______which exposed the corruption of the American meatpacking ind

The language produced by second language learners is technically called______, which is al

The dialect which is caused by social status is______.A．idiolectB．regional dialectC．sociol

The dialect which is caused by geographical place is______.A．idiolectB．regional dialectC．s