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【单选题】
Which of the following precautions must be taken if an electric immersion heater is used to keep the coolant in a diesel engine warm during the time the engine is secured?A.
the coolant temperature must be maintained at 180℃
B.
the thermostatic bypass valves must be manually opened before the engine is started
C.
the pressure cap must be removed while the
D.
electrical power to the heater must be secure
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【多选题】(Please select all correct answers. There might be more than one correct answer.) Which of the following is NOT a good design of PPT?
A.
including detailed information to show full preparation
B.
using fancy animations to attract audience’s attention
C.
consistently using Times New Roman throughout the PPT
D.
following the 6x7 rule for each slide
【多选题】Please select the works written by Joseph Conrad. (Choose all that apply.)
A.
Lord Jim
B.
The Great Gatsby
C.
Apocalypse Now
D.
Heart of Darkness
【简答题】A) while B) whenever C) or D) and
【简答题】A．Because B．Always C．Nevertheless D．Whenever
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