题目内容
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[主观题]
In the cut-to-length method, the harvesting chain's machine stock consists of a ______ and a ___
___.
A. Harvester, skidder B. Harvester, forwarder C. Feller-buncher, forwarder
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A. Harvester, skidder B. Harvester, forwarder C. Feller-buncher, forwarder
A.to harvest
B.harvest
C.harvesting
D.harvested
The aim of a nuclear reactor is ______.
A.to establish a controlled chain reaction in low concentrations of fissile material
B.to absorb neutrons travelling at a particular speed
C.to cause a rapid chain reaction in order to release the greatest amount of energy
D.to last the chain reaction forever