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【单选题】
亚急性感染性心内膜炎最常见的致病菌是（ ）。A.
B.
C.
D.
E.
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举一反三
【简答题】The head is essentially a flat plate of metal bolted to the top of the cylinder block with a gasket in between.
【单选题】__________is bolted to the top of the cylinder block with a gasket in between
A.
camshaft
B.
combustion chamber
C.
cuylinder head
D.
valves
【单选题】is bolted to the top of the cylinder block with a gasket between.
A.
Camshaft
B.
Cylinder head
C.
Combustion chamber
D.
Valves
【简答题】The cylinder head is essentially a flat plate of metal bolted to the top of the cylinder block with a gasket in between.
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