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【简答题】
如图，矩形ABCD中，AB＝8，BC＝6，请在下图中画出面积不相等的三个菱形，使菱形的顶点都在矩形的边上. （1）请在图①～③中画出三个菱形的大致图形（可在图中适当标明相关数据）； （图①） （图②） （图③） （2）请直接写出图①～③中三个菱形的面积分别是 、 、 .
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举一反三
【单选题】In a diesel engine, when refitting piston rings you should ①check the ring gap at the smallest diameter of the cylinder ②remove carbon from the ring groove
A.
①
B.
②
C.
①②
D.
neither ① nor ②
【单选题】In a diesel engine, when installing new piston rings it is important to check_______Iring gap clearance IIside clearance
A.
I only
B.
II only
C.
both I and II
D.
neither I nor II
【单选题】On a four-stroke diesel engine, when the piston is driven downwards by the expanding gas, it delivers power to the crankshaft through the _____.
A.
thrust block
B.
sounding rod
C.
connecting rod
D.
push rod
【简答题】As the piston again reaches BDC, the exhaust valve opens, but the intake valve remains closed. The piston moves upwards on the exhaust stroke to force the burnt gases out of the cylinder through the e...
【简答题】When the piston move to its highest position inside the cylinder, we can say it is at Top Dead Center (TDC).(翻译)
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