A．releasedB．was releasedC．has been releasedD．had been released
A. released
B. was released
C. has been released
D. had been released
查看答案
A．producedB．was producedC．producingD．had been
A. produced
B. was produced
C. producing
D. had been
A．have beenB．would have beenC．could have beenD．should have
A. have been
B. would have been
C. could have been
D. should have
A．to wonderingB．to be wonderingC．wonderD．wondering
A. to wondering
B. to be wondering
C. wonder
D. wondering
According to this introduction, the best way to use this book is______.
A. to become a good mathematical modeler
B. to tackle as many mathematical problems as possible
C. to do the problems given in the book on one's own
D. to have confidence in constructing mathematical models
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