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【单选题】
平键连接的工作面是键的 。A.
两个侧面
B.
上、下两面
C.
两个端面
D.
侧面和上、下面
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【简答题】Which material is mainly used in the dental implant nowadays?
【单选题】Nowadays the application of computer is mainly ( ).
A.
scientific computation
B.
data processing
C.
CAD
D.
CAM
【单选题】Nowadays we mainly program for PLC by ______.
A.
the special-purpose programming terminals
B.
the programming panels
C.
the personal computers connected to the PLC
D.
. the programming unit
【简答题】Nowadays, the mainly used database model by many DBMS, such as Access, SQLSever, MySQL, is .
【单选题】Nowadays we mainly program for PLC by ____.
A.
The special-purpose programming terminals
B.
The programming panels
C.
The personal computers connected to the PLC
D.
The programming unit
【简答题】使用价值是交换价值的()，交换价值是价值的()，价值是交换价值的()。
【单选题】听力原文： Nowadays people build ponds mainly for fishing and swimming and for the pleasure of looking at water. No matter why the pond was built, one thing is certain: All kinds of plants and animals will...
A.
To fish.
B.
To swim.
C.
To give people the pleasure of looking at water.
D.
To produce water power.
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