【单选题】下列关于镗模底座的论述,( )是错误的。
A.
镗模底座是夹具的主要支承元件之一,应有足够的强度和刚度。
B.
镗模底座上安装定位元件和镗模支架等元件的平面应铸出相应的凸台面。
C.
为保证镗模底座的强度与刚度,底座的高度值越大越好。
【单选题】This document is ______ unless it is offcially stamped.
【单选题】_______ was first used to drive a ship in 1801, replacing the sail.
【单选题】The purpose of this document is to ______?
A.
advertise Interlink Express to people in Liverpool
B.
record a package being received from a client
C.
inform a person that a package is awaiting collection
D.
provide a code for packages received
【判断题】∀ x(F(y) → G(x)) 等值于 F(y) → ∃ xG(x).
【单选题】I was about to sail away ______ I heard the sound of stamping and singing on the bank,
【简答题】This document is the property of Roll-Royce limited and may not be copied or used for any purpose other than that for which it is supplied without the express written authority of Roll-Royce limited.
【多选题】The relevant contents to the manufacturing process of a product are specified in the forms of document expressed by charts, tables and words. This document is called .
B.
technological document
D.
manufacturing document
【判断题】镗模底座上安装定位元件和镗模支架等元件的平面应铸出相应的凸台面,其高度一般为3~5mm。
【单选题】This document is ______ unless it is officially stamped.