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【单选题】
What does the new study by the two universities say about recent crop improvement efforts?A.
They fail to produce the same remarkable results as before the 1980s.
B.
They contribute a lot to the improvement of human food production.
C.
They play a major role in guaranteeing the food security of the world.
D.
They focus more on the increase of animal feed than human food grains.
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【单选题】液压系统中哪种辅助元件能作为储存和释放油液压力能的装置，将液压油的压力能储存起来，在需要时重新放出来，以保证液压系统正常地工作。
A.
过滤器
B.
蓄能器
C.
油箱
D.
油管
【单选题】在山岳或丘陵陡峻地区,区间线路纵断面特殊不利时,为了防止在陡长下坡道上失去控制的列车发生冲突或颠覆,应根据线路情况计算确定在区间或站内设置( )。
A.
安全线
B.
牵出线
C.
段管线
D.
避难线
【单选题】Don’t forget to _____ the cost of maintenance and repairs for the vehicle.
A.
count out
B.
factor in
C.
consider in
D.
take in
【简答题】Part I Sentence translation Directions: Translate the following sentences into Chinese or vice versa. Don’t forget to factor in the cost of maintenance and repairs for the vehicle.
【单选题】Which of the following would be appropriate cost units for a transport business? 1 Cost per tonne-kilometre 2 Fixed cost per kilometre 3 Maintenance cost of each vehicle per kilometre
A.
1 only
B.
1 and 2 only
C.
1 and 3 only
D.
1, 2 and 3
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