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【判断题】
对同一个弹簧振子,一是让其在光滑水平面上作一维振动,另一是在竖直悬挂情况下作振动,问两者的振动的频率不相同。
A.
正确
B.
错误
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参考答案:
举一反三
【单选题】三面刃铣刀是用来加工()。
A.
平面
B.
成形面
C.
较窄的通槽
D.
较宽的通槽
【单选题】Motor vessels usually have independent lube oil systems for main engine and reduction gears because ____.
A.
contaminants produced by the engine could harm the reduction gears
B.
non-additive oils are used in the main engine system
C.
different type centrifuges are required for the main engine and reduction gear tube systems
D.
coolers are not needed for the gear system
【简答题】超文本传输协议HTTP的端口号是______,文件传输协议FTP的端口号是__________,远程登录协议TELNET的端口号是______,域名解析服务器DNS的端口号是__________,简单邮件传输协议SMTP的端口号是________,邮局协议版本POP3的端口号是__________,交互式邮件存取协议IMAP的端口号是__________,简单文件传输协议TFTP的端口号是____...
【单选题】不能用来加工平键键槽的刀具是
A.
键槽铣刀
B.
立铣刀
C.
圆柱铣刀
D.
三面刃铣刀
【单选题】Motor vessels usually have independent lube oil systems for main engine and reduction gears because ________.
A.
coolers are not needed for the gear system
B.
contaminants produced by the engine could harm the reduction gears
C.
non-additive oils are used in the main engine system
D.
different type centrifuges are required for the main engine and reduction gear lube systems
【单选题】Motor vessels usually have independent lube oil systems for main engine and reduction gears because____
A.
coolers are not needed for the gear system
B.
contaminants produced by the engine could harm the reduction gears
C.
non-additive oils axe used in the main engine system
D.
different type centrifuges are required for the main engine and reduction gear lube systems
【多选题】下列哪些选项属于市场规制法
A.
反不正当竞争法
B.
消费者权益保和法
C.
产品质量法
D.
计划法
【多选题】定价策略,主要是指企业按照市场规律制定价格和变动价格等方式来实现营销目标。下列哪些选项属于定价策略( )
A.
基本价格
B.
折扣价格
C.
付款期限
D.
商业信用
【多选题】下列哪些选项属于多国本土化战略的优势()
A.
能够使产品和服务适应当地市场条件
B.
便于发现既定市场中潜在的有吸引力的市场空位
C.
标准化导致规模经济和低成本
D.
公司高层在很大程度上集中控制着公司的战略规划
E.
在全国范围内创造统一的质量标准
【多选题】下列哪些选项属于市场规制法A.反不正当竞争法
A.
消费者权益保和法C.产品质量法
B.
计划法
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