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【简答题】
甲、生产同一零件,均选用45钢,硬度要求220~250 HBS 。甲厂采用正火, 采用调质处理,均能达到硬度要求。试分析甲、产品的组织和性能差别。
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举一反三
【单选题】The question of the duration of the transit ______ primarily one of the intention of the parties．
A.
takes
B.
is
C.
has
D.
makes
【判断题】发送方是路由器A,要把 IP 数据报通过另一个路由器B转发到另一个网络上的一个主机。这时路由器A可以由 ARP缓存或广播可以直接获得目的主机的MAC地址。
A.
正确
B.
错误
【简答题】Tokyo, the capital of Japan, is one of the largest cities in the world. It is also one of the world’s most modern cities. Twice last century, the city was destroyed and rebuilt. In 1923 a major earthq...
【简答题】Hiking is not only one of the best forms of physical exercise , but also one of the most forms of me ntal relaxation . It is good for all ages and is especially suitable as a family and group activity...
【单选题】Of all the foods we know, fruit is one of the most healthful. It is also one of the most tasty foods. Almost everyone enjoys fruit. Fruit is grown in almost every part of the world. There are hundreds...
A.
Most people enjoy eating fruit.
B.
Fruit can be grown almost all over the world.
C.
There are less than a hundred kinds of fruits.
D.
There are three groups of fruits.
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