Coolant lubricant can’t be poured into _______________
A: the mains drains
B: ground water
C: the ground
D: all of above
A: the mains drains
B: ground water
C: the ground
D: all of above
举一反三
- Coolant lubricant can’t be poured into _______________ A: the mains drains B: ground wate C: the ground D: all of above
- The direction of the jet of coolant lubricant is __________. A: fixed and can be closed B: fixed and can’t be closed C: adjustable and can be closed D: adjustable and can’t be closed
- He was severely criticized ________that he didn’t work hard. A: for the ground B: on the ground C: in the ground D: under the ground
- ____ any area receives more water than the ground can absorb, the excess water flows to the lowest level, carrying loose material.
- Which one is not the common source of injection water: A: surface water B: ground water C: distilled water D: oil polluted water