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【单选题】
在下列图示机构中的各,哪些属于平面复合
A.
图b中偏心轮1与构件2的两处接触也只算一个约束;
B.
图c中齿轮2与齿轮4的接触算一个约束
C.
图a中滚子2与杆3的两处接触组成只算一个约束
D.
图c中齿轮1与齿轮2的接触算两个约束;
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举一反三
【单选题】下列有关人与金钱的说法中错误的是( )
A.
金钱拜物教使人唯利是图,损人利已
B.
人要做金钱的主人,不能做金钱的奴隶
C.
在商品经济时代,追求金钱是人生最高的目的
D.
人需要金钱,但金钱只是人发展自我,造福社会的条件之一
【单选题】The data which will NOT be saved by the VDR is ______.
A.
date and time
B.
ship’s position
C.
helm order and response
D.
remaining fuel onboard
【单选题】A DBA has been asked to create a table which will contain a substantial amount of detailed sales information for each calendar month and maintain it to contain only the last 12 months. Which of the fo...
A.
Create an MQT that selects the oldest month of data with the REFRESH IMMEDIATE option.
B.
Create 12 separate tables, create a view based on all 12, drop the table with the oldest month's data then drop and re- create the view.
C.
Create a range partitioned table, partitioned by month, and use the ALTER TABLE statement to detach the oldest month and attach storage for new data.
D.
Create a single table, extract the data to be retained using UNLOAD with a SELECT statement, drop and re-create the table then load only the data to be retained.
【单选题】The data which will NOT be save by the VDR is _____
A.
data and time
B.
ships position
C.
helm order and response
D.
remaining fuel on board
【单选题】下列有关人与金钱的说法中错误的是( )
A.
金钱拜物教使人唯利是图,损人利己
B.
人要做金钱的主人,不能做金钱的奴隶
C.
在商品经济时代,追求金钱是人生的最高的目的
D.
人需要金钱,但金钱只是人发展自我,造福社会的条件之一
【单选题】下列有关人与金钱的说法中错误的是( )
A.
金钱拜物教使人唯利是图,损人利己
B.
人要做金钱的主人,不能做金钱的奴隶
C.
在市场经济时代,追求金钱是人生的最高目的
D.
人需要金钱,但金钱只是人发展自我、造福社会的条件之一
【判断题】碑帖(tiè)
A.
正确
B.
错误
【判断题】The main advantages to the computational approach is the reliability of the data used. The results of the model are only as good as the parameters on which they depend and any shortcomings in either t...
A.
正确
B.
错误
【判断题】The mainadvantages to the computational approach is the reliability of the data used. The results of the model are only as good as the parameters on which they depend and any shortcomings in either th...
A.
正确
B.
错误
【单选题】在接触器联锁正反转控制电路中,正转启动运转正常,按下反转按钮,电动机不能反转的原因不可能是
A.
正转接触器主触头发生熔焊
B.
操作按钮顺序错误
C.
主电路中没有改变相序
D.
热继电器常闭触点没有复位
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