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【单选题】
边际贡献与安全边际率的关系是(    )。
A.
1-边际贡献率=安全边际率
B.
1+边际贡献率=安全边际率
C.
边际贡献率+安全边际率=1
D.
边际贡献×安全边际率=销售利润率
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【单选题】(单选题)国务院批准的中国首个以海洋经济为主题的国家战略层面新区是( )。
A.
浦东
B.
舟山
C.
青岛
D.
三亚
【单选题】听力原文:W1: I know youre all excited about our class project. But before we get started on the design of our mural, lets review some of the technical requirements for murals. What factors do we need to k...
A.
They are preparing for an examination.
B.
They plan to visit some famous murals.
C.
They are helping to design a new building.
D.
They will be creating their own mural.
【判断题】钢材拉伸试件安装在夹头中,试样的标距部分不得夹入钳口中,试样被夹长部分不小于钳口的二分之一。
A.
正确
B.
错误
【单选题】It is desired that the project________before the end of this month.
A.
will be finished
B.
is to be finished
C.
be finished
D.
is going to be finished
【判断题】RFID是一种接触式自动识别技术。
A.
正确
B.
错误
【单选题】They ________ to finish the project before Sunday, but they didn’t make it because of the heavy snow.
A.
succeeded
B.
tried
C.
managed
D.
thought
【单选题】工件在夹具中定位时,被夹具的某一个面限制了三个自由度的工件上的那个面,称为()。
A.
导向基准面
B.
主要基准面
C.
止推基准面
【单选题】It was desired that the project ______ before the end of this month.
A.
would be finished
B.
was to be finished
C.
be finished
D.
was going to be finished
【单选题】限制了( )的定位基准称为主要定位基准。
A.
一个及一个以上
B.
二个及二个以上
C.
三个及三个以上
D.
任意
【单选题】Before he left on vacation, he finished the project.
A.
Before left on vacation, he finished the project.
B.
Before leaving on vacation, he finished the project.
C.
Before on vacation, he finished the project.
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