属于不稳定性骨折的有()

【名词&注释】

不稳定性骨折(unstable fracture)、锯齿形(zigzag)

[单选题]属于不稳定性骨折的有()

A. 横断
B. 锯齿形
C. 粉碎性

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学习资料：

[单选题]An increase in the fuel injection pump discharge pressure can be caused by a/an _______.

A. leaking delivery valve
B. excessive bearing end play
C. plugged injector spray hole
D. increased plunger stroke

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