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【单选题】
关于干切削加工,()描述是不正确的。A.
干车削机床最好采用立式机床，干铣削机床最好采用卧式机床
B.
干切削加工最好采用涂层刀具
C.
干切削适合加工尺寸精度和表面粗糙度要求高的非封闭零件
D.
目前干切削有色金属和铸铁比较成熟，而干切削钢材、高强度钢材则存在问题较多
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举一反三
【单选题】闭路监控系统验收的主要参照的规范是()。
A.
《民用闭路监视电视系统工程技术规范》
B.
《安全防范系统验收规则》
C.
《智能建筑设计标准》
D.
《安全防范工程技术规范》
【简答题】词汇运用(10分) 小题1:Nelson devoted most of his life to ___________(fight) for democracy(民主)and won the Nobel Peace Prize in 1993. 小题2: When she heard something ___________(surprise), she couldn’t st...
【判断题】There is a wide variety of products available to buy on the internet. There are lots of bargains in shops in the run up to different festivals to encourage people of shopping onlin to spend more money...
A.
正确
B.
错误
【单选题】First of all, make a shopping list and stick to it. Secondly, don't bring too much money. Next, don't shop when you are in a hurry or when you're hungry. Lastly, get in and out quickly. This passage g...
A.
spend less money
B.
bargain with the shop keeper
C.
shop effectively and wisely
D.
shop onlin
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