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【单选题】Diesel engines are considered safer than gasoline engines because ______．
A.
They are more heavily built
B.
The fuel used is less volatile
C.
They can be easily reversed
D.
They operate at a lower speed
查看完整题目与答案
【单选题】下长坡连续使用行车制动会导致什么？
A.
会缩短发动机寿命
B.
增加驾驶人的劳动强度
C.
会使制动器温度升高而使制动效果急剧下降
D.
容易造成车辆倾翻
查看完整题目与答案
【单选题】Diesel engines are classified as reciprocating internal combustion engines because they
A.
rn fuel in a chamber where its energy moves a piston up and down
B.
use energy from fuel burned outside their cylinders
C.
a continuous combustion process to impart rotary motion to the pistons
D.
burn fuel in a combustion chamber that moves back and forth
查看完整题目与答案
【单选题】Lubricating systems for diesel engines are usually designed to initially provide lube oil to the engine _____.
A.
camshaft beatings
B.
main bearings
C.
piston crowns
D.
cylinder walls
查看完整题目与答案
【单选题】下长坡连续使用行车制动会导致什么
A.
会缩短发动机寿命
B.
增加驾驶人的劳动强度
C.
容易造成车辆倾翻
D.
会使制动器温度升高而使制动效果急剧下降
查看完整题目与答案
【单选题】在叶绿素和血红朊中存在的卟啉系统的基本单元是什么?
A.
噻唑
B.
呋喃
C.
噻吩
D.
吡咯
查看完整题目与答案
【单选题】Diesel engines are considered safer than gasoline engines because.
A.
they are more heavily built
B.
the fuel used is less volatile
C.
they can be easily reversed
D.
they operate at a lower speed
查看完整题目与答案
【单选题】Diesel engines are classified as reciprocating internal combustion engines because they
A.
use energy from fuel burned outside their cylinders
B.
burn fuel in a combustion chamber that moves back and forth
C.
burn fuel in a chamber where its energy moves a piston back and forth
D.
use a continuous combustion process to impart rotary motion to the pistons
查看完整题目与答案
【简答题】下长坡连续使用行车制动会导致什么？
查看完整题目与答案
【简答题】北京时间2011年3月11日13时46分，日本本州岛仙台港发生 9.0级特大地震截至当地时间15日20时，海啸灾害已造成3373人死亡，15000多人失踪。中国红十字会采取紧急救援，协助日本全力抢救被困人员。福岛核电站冷却系统失灵，导致放射性物质泄漏3月11日。日本向海中排放污水。请你用所学的知识根据下图，回答在地震中对伤员的救援和处理过程中的一些问题： (1)地震发生后，无论是自救还是他救，都必...
查看完整题目与答案
相关题目：
【单选题】Diesel engines are considered safer than gasoline engines because ______．
A.
They are more heavily built
B.
The fuel used is less volatile
C.
They can be easily reversed
D.
They operate at a lower speed
查看完整题目与答案
【单选题】下长坡连续使用行车制动会导致什么？
A.
会缩短发动机寿命
B.
增加驾驶人的劳动强度
C.
会使制动器温度升高而使制动效果急剧下降
D.
容易造成车辆倾翻
查看完整题目与答案
【单选题】Diesel engines are classified as reciprocating internal combustion engines because they
A.
rn fuel in a chamber where its energy moves a piston up and down
B.
use energy from fuel burned outside their cylinders
C.
a continuous combustion process to impart rotary motion to the pistons
D.
burn fuel in a combustion chamber that moves back and forth
查看完整题目与答案
【单选题】Lubricating systems for diesel engines are usually designed to initially provide lube oil to the engine _____.
A.
camshaft beatings
B.
main bearings
C.
piston crowns
D.
cylinder walls
查看完整题目与答案
【单选题】下长坡连续使用行车制动会导致什么
A.
会缩短发动机寿命
B.
增加驾驶人的劳动强度
C.
容易造成车辆倾翻
D.
会使制动器温度升高而使制动效果急剧下降
查看完整题目与答案
【单选题】在叶绿素和血红朊中存在的卟啉系统的基本单元是什么?
A.
噻唑
B.
呋喃
C.
噻吩
D.
吡咯
查看完整题目与答案
【单选题】Diesel engines are considered safer than gasoline engines because.
A.
they are more heavily built
B.
the fuel used is less volatile
C.
they can be easily reversed
D.
they operate at a lower speed
查看完整题目与答案
【单选题】Diesel engines are classified as reciprocating internal combustion engines because they
A.
use energy from fuel burned outside their cylinders
B.
burn fuel in a combustion chamber that moves back and forth
C.
burn fuel in a chamber where its energy moves a piston back and forth
D.
use a continuous combustion process to impart rotary motion to the pistons
查看完整题目与答案
【简答题】下长坡连续使用行车制动会导致什么？
查看完整题目与答案
【简答题】北京时间2011年3月11日13时46分，日本本州岛仙台港发生 9.0级特大地震截至当地时间15日20时，海啸灾害已造成3373人死亡，15000多人失踪。中国红十字会采取紧急救援，协助日本全力抢救被困人员。福岛核电站冷却系统失灵，导致放射性物质泄漏3月11日。日本向海中排放污水。请你用所学的知识根据下图，回答在地震中对伤员的救援和处理过程中的一些问题： (1)地震发生后，无论是自救还是他救，都必...
查看完整题目与答案