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问题 单项选择题

经检测，铣削球面直径超差，则不能产生的原因为（）。

A、工件与夹具不同轴

B、工件台调整不当

C、对刀不正确铣刀刀尖轨迹未通过工件端面中心

D、铣刀刀尖回转直径调整不当

答案

参考答案：C

填空题

筒式磁选机按其槽体结构不同可分为（）、（）、（）。
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单项选择题

Routing protocols use different techniques for assigning ______ to individual networks. Further, each routing protocol forms a metric aggregation in a different way. Most routing protocols can use multiple paths if the paths have an equal ______ . Some routing protocols can even use multiple paths when paths have an unequal cost. In either case, load ______ can improve overall allocation of network bandwidth. When multiple paths are used, there are several ways to distribute the packets. The two most common mechanisms are per-packet load balancing and per-destination load balancing. Per-packet load balancing distributes the ______ across the possible routes in a manner proportional to the route metrics. Per-destination load balancing distributes packets across the possible routes based on ______.

A. resources B. bits C. frames D. packets
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