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【单选题】
下列关于托帕石表述正确的是:A.
无解理
B.
具有一组平行于底面{001}的中等-完全解理
C.
折射率1.624-1.644
D.
为单斜晶系
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反馈参考答案：
举一反三
【简答题】Human activity could bring about melting of the ______ in this century.
【单选题】The only trouble with young drivers is that
A.
they tend to own sports ear.
B.
they are too proud of their ears.
C.
they soon become like the older ones.
D.
they think they are on the battlefield.
【简答题】Don't pretend to know. You don't know it. Don't pretend not to know. You really know it.
【单选题】—Remember not to pretend to know what you don’t know. — _____. My last lesson is still fresh.
A.
No, I will
B.
No, I won’t
C.
Yes, I won’t
D.
Yes, I will
【单选题】The best statements about human error is( )
A.
Error is an inevitable part of human behavior
B.
As long as we pay more attention, and operate accurately, we can avoid the error
C.
Only a small part of accidents were caused by human error
【单选题】Don’t pretend _____.Look!You are holding your English book upside down.
A.
to read
B.
to have read
C.
to be reading
D.
reading
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