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【单选题】
在D型燃油喷射系统中,对喷油器的通电时间影响最大的传感器是()
A.
空气流量传感器
B.
进气歧管绝对压力传感器
C.
氧传感器
D.
冷却液温度传感器
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【单选题】You operate a factory that produces beach towels. Your current level of output equals 2,000 towels per week. Your weekly variable cost equals $8,000. If your total cost each week equals $9,000, it fol...
A.
the average variable cost of production equals $2 per towel.
B.
the average total cost of production equals $4 per towel.
C.
the average total cost of production equals $4.50 per towel.
D.
the average total cost of production equals $8 per towel.
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【单选题】You operate a factory that produces beach towels. Your current level of output equals 2,000 towels per week. Your weekly variable cost equals $8,000. If your total cost each week equals $9,000, it fol...
A.
the average variable cost of production equals $2 per towel.
B.
the average variable cost of production equals $4 per towel.
C.
the average total cost of production equals $8 per towel.
D.
none of the above
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【单选题】Your ship’s certificates show that you did not do renewing work for certificate.All certificates have expired a few days before. Thus, your ship is（）. It follows therefore that she will（）
A.
seaworthy； be fined in our port
B.
un-seaworthy； be disassembled in our port
C.
seaworthy； be assembled in our port
D.
un-seaworthy；be detained in our port
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【单选题】You run a business producing picture frames. This month your total cost of production is $10,000, your variable cost of production is $6,000, and you produce 3,000 picture frames. It follows that:
A.
average variable cost is $2.
B.
average total cost is $3.
C.
average total cost is $1.
D.
average fixed cost is $1.
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【简答题】在我国，对期货交易实施行业自律管理的机构是（ ）。
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【单选题】Your ship's certificates show that you did not do renewing work for certificate. All certificates have expired a few days before. Thus, your ship is ____. It follows therefore that she will ____.
A.
seaworthy; be fined in our port
B.
seaworthy; be assembled in our port
C.
un-seaworthy; be disassembled in our port
D.
un-seaworthy; be detained in our port
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【简答题】“三话”是什么?与“三言”有何区别?
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【简答题】在我国，对期货交易实施行业自律管理的机构是（ ）。
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【单选题】苯氧乙醇作为日用化学品防腐剂,其最佳使用的pH范围为( )。
A.
2~5
B.
3~10
C.
4~8
D.
8~12
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【单选题】在我国,对期货交易实施行业自律管理的机构是( )
A.
中国证监会
B.
中国期货业协会
C.
期货交易所
D.
期货经纪公司
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【单选题】You operate a factory that produces beach towels. Your current level of output equals 2,000 towels per week. Your weekly variable cost equals $8,000. If your total cost each week equals $9,000, it fol...
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