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【单选题】
On a medium-speed main propulsion diesel engine, the crank-pin or crank journalA.
arings receive lubricating oil from ____.
B.
a spindle(锭子或主轴)lubricator
C.
an oiljet(喷射器)
D.
internal splashing
E.
drilled passages in the crankshaft
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【简答题】A．To observe people's attitude towards strangers. B．To see how people get along with their friends. C．To change people's behaviour in social life. D．To find out how shy people are.
【单选题】Which one of the following statements is correct concerning the payback period?
A.
An investment is acceptable if its calculated payback period is greater than some pre-specified period of time.
B.
An investment should be accepted if the payback is positive and rejected if it is negative.
C.
An investment should be rejected if the payback is positive and accepted if it is negative.
D.
An investment is acceptable if its calculated payback period is less than some pre-specified period of time.
E.
An investment should be accepted any time the payback period is less than the discounted payback period, given a positive discount rate.
【简答题】A．To observe people's attitude towards strangers. B．To see how people get along with their friends. C．To change people's behavior. in social life. D．To find out how shy people are.
【单选题】Which one of the following statements is correct concerning the payback period?
A.
An investment is acceptable if its calculated payback period is less than some pre-specified period of time.
B.
An investment should be accepted if the payback is positive and rejected if it is negative.
C.
An investment should be rejected if the payback is positive and accepted if it is negative.
D.
An investment is acceptable if its calculated payback period is greater than some pre-specified period of time.
【简答题】程序设计语言经历了机器语言、_________、高级语言(面向过程的高级语言)、面向对象的编程语言。
【单选题】程序设计语言经历了()→()→()发展过程?
A.
机器语言→汇编语言→自然语言
B.
机器语言→注释语言→自然语言
C.
机器语言→汇编语言→高级语言
D.
自然语言→汇编语言→高级语言
【简答题】用括号内所给动词的正确形式完成短文。 How to Observe the United States What is the best way to observe the United States? The best way 1 (depend) on how much you want to spend, what part of the country you want 2 (visit...
【单选题】The plants are in a(n) ( ) plastic box, so the children can observe how the roots grow with time.
A.
appropriate
B.
intricate
C.
transparent
D.
waterproof
【简答题】程序设计语言经历了__________、__________和__________三个主要发展阶段。
【单选题】Why did the American journalist go to a Shanghai hospital?
A.
To observe how acupuncture is used in an operation.
B.
To talk to a patient who has an operation with acupuncture as anesthesia.
C.
To learn how acupuncture can relieve pain.
D.
To see what the acupuncture needles are like.
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