Which of the following substance is not used to produce carbon fibers? A) Rayon B) Polyacrylonitrile C) Pitch D) Pregreg
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举一反三
【单选题】He also says there is less chance of cheating with the in-class variety. In 2012, 125 students at Harvard were caught up in a scandal when it was discovered they had cheated on a take-home exam for a ...
A.
Elderly students find it hard to keep up with the rapid changes in education.
B.
Some believe take-home exams may affect students' performance in other courses.
C.
In-class exams are believed to discourage cheating in exams.
D.
Most professors agree whether to give an in-class or a take-home exam depends on type of course being taught.
E.
The author dropped out of college some forty years ago.
F.
Some students think take-home exams will eat up their free time.
G.
Students who put off their work until the last moment often find the exams more difficult than they actually are.
【单选题】A MAIN idea of the section "Nest Of Baby Turtles Was Found" is that the turtles are doing well in some areas of the Bronx River. Which key detail from the section supports this MAIN idea?
A.
He did see lead and PCBs, though. Both the sliders and the snappers had taken in those chemicals.
B.
Sykes thinks the chemicals are still around because the younger turtles had them. In other words, the Bronx River still needs more cleaning up.
C.
The turtles are thriving in parts of the river. Sykes found a nest with baby snapping turtles in it.
D.
Sykes hopes for progress in this study. Hopefully, next time there will be fewer toxins in the turtles' blood.