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【单选题】
可以作为金刚石替代品,制造耐磨切削刀具的陶瓷是( )A.
氧化铝陶瓷
B.
氮化硅陶瓷
C.
碳化硅陶瓷
D.
氮化硼陶瓷
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反馈参考答案：
举一反三
【单选题】The company______a rise in salary for its sales managers, but nothing has happened yet.
A.
is promised
B.
has been promising
C.
is promising
D.
promised
【单选题】The company _______ a rise in salary for ages but nothing has happened yet.A．has been promisingB
A.
26. The company _______ a rise in salary for ages but nothing has happened yet. A．has been promising
B.
had promised
C.
promised
D.
Promises
【单选题】The manager______ a rise in salary for ages, but nothing has happened yet.
A.
is promised
B.
is promising
C.
has been promising
D.
promised
【单选题】The company ____ a rise in salary for ages, but nothing has happened yet.
A.
is promised
B.
is promising
C.
has been promising
D.
promised
【简答题】The company ________ a rise in salary for ages, but nothing has happened yet. A) is promised B) has been promising C) is promising D) promised
【单选题】The company ______ a rise in salary for ages, but nothing has happened yet.
A.
is promised
B.
has been promising
C.
is promising
D.
promised
【单选题】Nothing has happened to them , __________?
A.
has it
B.
hasn't it
C.
have they
D.
haven't they
【简答题】指令( )可把操作数的某些位 置1。
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