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【单选题】
空调系统温度控制器一般有波纹管式和( )。(I)A.
感
B.
热敏电阻式
C.
毛细管式
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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
【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
【单选题】In fog you observe your radar and determine that risk of collision exists with a vessel which is 2 miles off your port bow. You should ______.
A.
stop your engines
B.
sound the danger signal at two-minute intervals
C.
hold course and speed until the other vessel is sighted
D.
take avoiding action as soon as possible
【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
【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
【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
【简答题】下长坡连续使用行车制动会导致什么？
【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...
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