In this work, our objective was to improve the carbon fiber performance significantly by u
A.producing high quality precursors
B.to produce high quality precursors
C.so that produce high quality precursors.
D.produced high quality precursors
A.producing high quality precursors
B.to produce high quality precursors
C.so that produce high quality precursors.
D.produced high quality precursors
Have you ever noticed any (improve)______in the work environment of our factory?
A.producing high quality precursors
B.to produce high quality precursors
C.so that produce high quality precursors.
D.produced high quality precursors
A、producing high quality precursors
B、to produce high quality precursors
C、so that produce high quality precursors
D、produced high quality precursors
A.will improve
B.was improved
C.has improved
D.will be improved
The objective of vulcanizing rubber
A.To improve processibility
B.To increase hardness and chemical resistance
C.To reduce materials cost
D.To increase amorphousness
According to the passage, in certain situations our former experiences ______.
A.will always work once again
B.can improve the efficiency of solving problems
C.can be our personal treasure
D.may hinder us from conceiving better ideas
A、Our car is not gas.
B、Our car is over.
C、Our car is running out of gas.
D、Our car is no gas.
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