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单选题
The _____ of the space shuttle that had exploded in the air were scattered over a large area.
A
segments
B
fragments
C
elements
D
ornaments
参考答案
参考解析
解析：
句意：航天飞机在空中爆炸，其碎片分散在很大的一片区域。segment部分；片；段。fragment碎片。element元素；要素；成分。ornament装饰物。
句意：航天飞机在空中爆炸，其碎片分散在很大的一片区域。segment部分；片；段。fragment碎片。element元素；要素；成分。ornament装饰物。
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考题
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考题
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考题
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考题
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B:return
C:dismiss
D:withdraw
考题
When the glaciers（ ）after the last ice age,the five Great Lakes of North America were formed.A.advanced
B.evaporated
C.thawed
D.exploded
考题
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B.suitable
C.efficient
D.fit
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B:experiment
C:miracle
D:effort
考题
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考题
The key to the industrialization of space is the U.S. space shuttle.______ it, astronauts will be able to fly into space and returning many times.
A.With
B.By
C.On
D.In
考题
单选题The key to the industrialization of space is the US space shuttle with it, astronauts will acquire a workhouse vehicle _____ of flying into space and returning many times.A
capableB
suitableC
efficientD
fit
考题
单选题Two men were（）a large log over the rough ground with the help of a rope.A
pushingB
drawingC
draggingD
carrying
考题
单选题Large volumes of carbon dioxide are safe and effective for fighting fires in enclosed space, such as in the pumproom, provided that the（）.A
persons in the space wear gas masksB
persons in the space wear damp cloths over their mouths and nostrilsC
ventilation system is secured and all persons leave the spaceD
ventilation system is kept operating
考题
单选题Steam smoke will occur when（）.A
Extremely cold air from shore passes over warmer waterB
Warm dry air from shore passes over cooler waterC
Cold ocean water evaporates into warm airD
Cool rain passes through a warm air mass
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单选题Following an overhaul of a crosshead type diesel engine, the engine is jacked over with the turning gear as part of the pre-start procedure, which of the listed pre-start procedures should be carried out?（）A
Ensure proper cylinder lube oil flowB
Open all air space drain cocksC
Open all indicator valvesD
all of the above
考题
单选题In many areas atoll clouds (clouds of vertical development) are produced over small islands. These are the result of（）.A
rising air currents produced by the warm islandsB
warm air from the sea rising over higher land areasC
cool land air mixing with warm sea airD
descending air over the islands
考题
单选题Large volumes of carbon dioxide are safe and effective for fighting fires in enclosed spaces，such as in a pumproom，provided that the（）.A
persons in the space wear gas masksB
persons in the space wear damp cloths over their mouths and nostrilsC
ventilation system is secured and all persons leave the spaceD
ventilation system is kept operating
考题
单选题A space should be ventilated when（）.A
The cargo's temperature is colder than the dew point of the air in the spaceB
The cargo's temperature is warmer than the dew point of the air in the spaceC
The dew point of the air in the space is lower than the dew point of the outside airD
All of the above
考题
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