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问题 单项选择题

（）不是引起高速打摆现象的主要原因。

A.前轮胎修补、前轮辋变形、前轮毂螺栓短缺引起动不平衡

B.减振器失效，前钢板弹力不一致

C.车架变形或铆钉松动

D.前束过大、车轮外倾角、主销后倾角变小

答案

参考答案：D

单项选择题

Many of the activities performed during the preliminary investigation are still being conducted in (1) , but in much greater depth than before. During this phase, the analyst must become fully aware of the (2) and must develop enough knowledge about the (3) and the existing systems to enable an effective solution to be proposed and implementeD. Besides the (4) for process and data of current system, the deliverable from this phase also includes the (5) for the proposed system.

1（）

A．analysis phase

B．design phase

C．implementation phase

D．maintenance phase
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单项选择题

在MRI矢状位上，Chamberlain线是指()

A．颅前点与颅后点之间的连线

B．硬腭到枕骨凹线下缘之间的连线

C．沿斜坡后缘的延续线

D．硬腭到枕骨大孔后缘中点连线

E．以上全对
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