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问题 填空题

一个圆柱底面半径是2分米，体积是125.6立方分米，它的高是______分米．

答案

125.6÷（3.14×22）

=125.6÷12.56

=10（分米）；

答：它的高是10分米．

故答案为：10．

单项选择题

astute service providers realize that the continued support of legacy X.25 and asynchronous network element using separate operations network is cost (141) . For example, the maintenance of multiple networks can require additional staff. Often, this staff must be trained on multiple vendor technologies, sometimes requiring parallel groups specializing in each (142) . Hence, additional maintenance procedures must be maintained and administrative records are (143) . The duplication of transport facilities to carry (144) network traffic is an inefficient use of resources. And not surprisingly, more technologies installed in a central office means the necessity for more physical space and an increase in power connections and power consumption, migration of these (145) network elements to IP-based DCns is alogical strategy.

（141）是（）

A.prohibitive

B.feasible

C.connective

D.special
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单项选择题

以下只生产中国自主品牌汽车的汽车公司（）。

A、长安

B、马自达

C、沃尔沃

D、比亚迪
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