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【单选题】
能进行螺纹加工的数控车床,一定安装了( )。A.
测速发电机
B.
主轴脉冲编码器
C.
温度控制器
D.
旋转变压器
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举一反三
【简答题】The most often used reinforcing agents are carbon black and ( ).
【单选题】The use of sinking and dispersing chemical agents for removal of surface oil is ______.
A.
the most common method used in the United States
B.
too expensive for common use
C.
generally safe to sea life
D.
authorized only with prior approval of the Federal On-Scene Coordinator
【单选题】All are alkylating agents used in chemotherapy EXCEPT:
A.
Melphalan
B.
Busulfan
C.
Cladribine
D.
Cyclophosphamide
【单选题】Agents that are used to inhibit bacterial growth are considered
A.
bacteriocidal
B.
bacteriostatic
C.
antiseptics
D.
disinfectants
【单选题】Before the age of the Internet, we used to ______ our holidays through travel agents.
A.
book
B.
having booked
C.
booking
D.
have booked
【多选题】Hyaluronic acid has been used as agents for
A.
joint diseases
B.
cataracts replacement operation
C.
blood transfusion
D.
cosmetics
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