单项选择题

Both men and women, nine times out of ten, are firmly______ of the superior excellence of their own performance.

A．asserted
B．ensured
C．convinced
D．conceived
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单项选择题
Every device______ in the spacecraft must be designed and made with great care so as to be sure that nothing goes wrong in operation.
A．to be fitted
B．fitted
C．fitting
D．to have been fitted
单项选择题
Memorization which does not include thinking and understanding______ students being unable to use what has been learnt.
A．results in
B．centers on
C．adjusts to
D．refers to
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