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單項(xiàng)選擇題

The designed （） is 20 tons per day, but the fresh water generator can only distil 15 tons at present.

A.displacement
B.weight
C.power
D.capacity

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單項(xiàng)選擇題

The defective places in the furnace （） with fire bricks.

A.should be paved
B.should be cleaned
C.should be dismantled
D.should be welded

單項(xiàng)選擇題

After fitting back in place the gear wheels, don’t forget to （） them.

A.fulfill
B.eliminate
C.grease
D.bend

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