one half crankshaft speed in a two-stroke cycle diesel engine
crankshaft speed in a two-stroke cycle diesel engine
two times crankshaft speed in a two-stroke cycle diesel engine
one-fourth times crankshaft speed in a four-stroke cycle diesel engine
第1题：
A. Warn the user
B. Report through proper channels
C. Wipe the drive
D. Give the computer back to the user
第2题：
In America, which of the following is NOT the requirement for the students wanting to get their driver's license?
A. They must be 16 years old.
B. They should go to have their driver's test.
C. They must reach the proper age to drive.
D. They ought to do well in their driver's course.
54．答案为A 从最后一段第一句可看出在美国，不是每个州都要求驾驶员年满16岁，B、C、 D选项是必需的条件。
第3题：
● A well-designed system should be（73）.
①easily understood
②reliable
③straightforward to implement
④straightforward to maintain
（73）
A．①②
B．①③④
C．②③④
D．①②③④
第4题：
A technician has identified prohibited content on a user’s hard drive. Which of the following should be done NEXT?（）
第5题：
On a ship，a door that is required to be marked KEEP CLOSED is designed to ______．
A.prevent the passage of flammable gases
B.prevent the passage of poisonous vapors
C.delay the spread of heat and flames
D.maintain watertight integrity
第6题：
Procedures for the proper control and screening of checked baggage are designed to prevent ()from being introduced into the baggage compartment of an aircraft
A.weapons
B.explosives
C.hair mouse
D.ammunition
第7题：
You are on a tanker designed to carry molten sulfur．Which statement is TRUE ________．
A.There must be two portable toxic vapor detectors on board
B.The cargo tank ventilation system must maintain the H2S vapor concentration at 1.85% or more by volume
C.Cargo temperature may be taken by portable thermometers
D.The pressure in the heating coils in the tanks must be less than that of the cargo exerted on them
第8题：
Because the timing of injection is crucial, _____ mounted on the camshaft, which is driven by the crankshaft are used to operate the fuel pumps, one of which is provided for each cylinder.
A.gears
B.rams
C.barrels
D.cams
第9题：
第10题：
In order to ensure there is proper airflow in a new computer, which of the following should be performed?（）