第三章单元测试
- The ( ) in the cylinder is connected to the top of a connecting rod.
- A crankshaft’s job in an engine is to ( )
- The crank connecting rod mechanism consists of three parts—( ).
- Crank-connecting rod mechanism is the main working mechanism of reciprocating internal combustion engine.（ ）
- The top of the cylinder block is covered with the cylinder head. （ ）
A:cylinder
B:crankshaft
C:piston
D:valve
答案:piston
A:keep cylinder heads in place
B:deliver fuel to the cylinders
C:convert fuel energy into mechanical energy
D:change linear motion into rotational motion
A:camshaft and valve group
B:crankshaft and flywheel group
C:engine block group
D:piston and connecting rod group
A:对 B:错
A:错 B:对
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